In 1340 Blanche of the Tower was born to King Edward III of England (age 27) and Philippa of Hainault Queen Consort England (age 25) at the Tower of London [Map]. she died the same year and was buried at the east side of the door to the Chapel of St Edmund, Westminster Abbey [Map]. Coefficient of inbreeding 3.00%.

On 15 Jun 1330 Edward "Black Prince" was born to King Edward III of England (age 17) and Philippa of Hainault Queen Consort England (age 15) at Woodstock Palace, Oxfordshire [Map]. Coefficient of inbreeding 3.00%.

On 16 Jun 1332 Isabella Countess Bedford and Soissons was born to King Edward III of England (age 19) and Philippa of Hainault Queen Consort England (age 17) at Woodstock Palace, Oxfordshire [Map]. Coefficient of inbreeding 3.00%.

On 19 Dec 1333 Joan Plantagenet was born to King Edward III of England (age 21) and Philippa of Hainault Queen Consort England (age 19) at Tower of London [Map]. Coefficient of inbreeding 3.00%.

On 16 Feb 1337 William of Hatfield was born to King Edward III of England (age 24) and Philippa of Hainault Queen Consort England (age 22) at Hatfield [Map]. He died shortly afterwards around 03 Mar 1337. He was buried at York Minster [Map] where there is a monument to him in the north aisle. Coefficient of inbreeding 3.00%.

On 29 Nov 1338 Lionel Plantagenet 1st Duke of Clarence was born to King Edward III of England (age 26) and Philippa of Hainault Queen Consort England (age 24) at Antwerp [Map]. Coefficient of inbreeding 3.00%.

On 20 Jul 1346 Margaret Plantagenet Countess of Pembroke was born to King Edward III of England (age 33) and Philippa of Hainault Queen Consort England (age 32) at Windsor Castle [Map]. Coefficient of inbreeding 3.00%.

On 06 Mar 1340 John of Gaunt 1st Duke Lancaster was born to King Edward III of England (age 27) and Philippa of Hainault Queen Consort England (age 25) at the Prinsenhof Palace [Map] in Ghent aka Gaunt. Coefficient of inbreeding 3.00%.

In 1347 Thomas of Windsor was born to King Edward III of England (age 34) and Philippa of Hainault Queen Consort England (age 32). In 1348 he died. Coefficient of inbreeding 3.00%.

In 1348 William of Windsor was born to King Edward III of England (age 35) and Philippa of Hainault Queen Consort England (age 33). In 1348 he died. He was buried at the east side of the door to the Chapel of St Edmund, Westminster Abbey [Map]. Coefficient of inbreeding 3.00%.

On 07 Jan 1355 Thomas of Woodstock 1st Duke of Gloucester was born to King Edward III of England (age 42) and Philippa of Hainault Queen Consort England (age 40) at Woodstock Palace, Oxfordshire [Map]. Coefficient of inbreeding 3.00%.

On 10 Oct 1344 Mary Plantagenet Duchess Brittany was born to King Edward III of England (age 31) and Philippa of Hainault Queen Consort England (age 30) at Bishop Waltham's Palace, Hampshire [Map]. Coefficient of inbreeding 3.00%.

On 05 Jun 1341 Edmund of Langley 1st Duke York was born to King Edward III of England (age 28) and Philippa of Hainault Queen Consort England (age 26) at King's Langley, Hertfordshire [Map]. Coefficient of inbreeding 3.00%.

Fulk Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Hugh Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Isabella Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.98%.

Florence Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.98%.

In 1440 Laura Bourchier Countess Devon was born to Henry Bourchier 2nd Count Eu 1st Earl Essex (age 36) and Isabel York Countess Eu and Essex (age 31). She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.98%.

Edward Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Around 1438 John Bourchier 6th Baron Ferrers of Groby was born to Henry Bourchier 2nd Count Eu 1st Earl Essex (age 34) and Isabel York Countess Eu and Essex (age 29). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

In 1431 Humphrey Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex (age 27) and Isabel York Countess Eu and Essex (age 22). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Henry Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Thomas Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

Around 1430 William Bourchier Viscount Bourchier was born to Henry Bourchier 2nd Count Eu 1st Earl Essex (age 26) and Isabel York Countess Eu and Essex (age 21). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.98%.

In 1452 Catherine Valois was born to John Valois II Duke Alençon (age 42) and Marie Armagnac Duchess Alençon (age 32). Coefficient of inbreeding 2.97%.

In 1454 Rene Valois Duke Alençon was born to John Valois II Duke Alençon (age 44) and Marie Armagnac Duchess Alençon (age 34). Coefficient of inbreeding 2.97%.

In 1305 Charles Évreux was born to Louis I Count Évreux (age 28) and Margaret Artois Countess Évreux (age 20). He a great x 2 grandson of King Henry III of England. Coefficient of inbreeding 2.89%.

In 1303 Marie Évreux Duchess of Brabant was born to Louis I Count Évreux (age 26) and Margaret Artois Countess Évreux (age 18). She a great x 2 granddaughter of King Henry III of England. Coefficient of inbreeding 2.89%.

On 27 Mar 1306 Philip "Noble" III King Navarre was born to Louis I Count Évreux (age 29) and Margaret Artois Countess Évreux (age 21). He a great x 2 grandson of King Henry III of England. Coefficient of inbreeding 2.89%.

In 1307 Margaret Évreux Countess Auvergne and Boulogne was born to Louis I Count Évreux (age 30) and Margaret Artois Countess Évreux (age 22). She a great x 2 granddaughter of King Henry III of England. Coefficient of inbreeding 2.89%.

In 1310 Joan Évreux Queen Consort France was born to Louis I Count Évreux (age 33) and Margaret Artois Countess Évreux (age 25). She a great x 2 granddaughter of King Henry III of England. Coefficient of inbreeding 2.89%.

On 24 Feb 1500 Charles V Holy Roman Emperor was born to Philip "Handsome Fair" King Castile (age 21) and Joanna "The Mad" Trastámara Queen Castile (age 21) at Ghent [Map]. Coefficient of inbreeding 2.88%.

On 15 Sep 1505 Mary Queen Hungary was born to Philip "Handsome Fair" King Castile (age 27) and Joanna "The Mad" Trastámara Queen Castile (age 26). Coefficient of inbreeding 2.88%.

On 10 Mar 1503 Ferdinand I Holy Roman Emperor was born to Philip "Handsome Fair" King Castile (age 24) and Joanna "The Mad" Trastámara Queen Castile (age 24) at Alcalá de Henares. Coefficient of inbreeding 2.88%.

On 15 Nov 1498 Eleanor of Austria Queen Consort France Queen Consort Portugal was born to Philip "Handsome Fair" King Castile (age 20) and Joanna "The Mad" Trastámara Queen Castile (age 19). Coefficient of inbreeding 2.88%.

On 18 Jul 1501 Isabella of Austria Queen Consort Denmark and Norway was born to Philip "Handsome Fair" King Castile (age 22) and Joanna "The Mad" Trastámara Queen Castile (age 22) at Brussels [Map]. Coefficient of inbreeding 2.88%.

On 14 Jan 1507 Catherine of Austria Queen Consort Portugal was born to Philip "Handsome Fair" King Castile and Joanna "The Mad" Trastámara Queen Castile (age 28). Coefficient of inbreeding 2.88%.

On 06 Oct 1577 Ferdinand Wittelsbach Archbishop Cologne was born to William Wittelsbach V Duke Bavaria (age 29) and Renata Lorraine Duchess Bavaria (age 33). Coefficient of inbreeding 2.86%.

On 04 Jul 1587 Magdalene Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 38) and Renata Lorraine Duchess Bavaria (age 43). Coefficient of inbreeding 2.86%.

On 22 Sep 1576 Cardinal Philipp Wilhelm Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 27) and Renata Lorraine Duchess Bavaria (age 32). Coefficient of inbreeding 2.86%.

On 18 Dec 1574 Maria Anna Wittelsbach Holy Roman Empress was born to William Wittelsbach V Duke Bavaria (age 26) and Renata Lorraine Duchess Bavaria (age 30). Coefficient of inbreeding 2.86%.

In 1584 Albert VI Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 35) and Renata Lorraine Duchess Bavaria (age 39). Coefficient of inbreeding 2.86%.

On 30 May 1580 Karl Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 31) and Renata Lorraine Duchess Bavaria (age 36). Coefficient of inbreeding 2.86%.

On 23 Jan 1570 Christoph Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 21) and Renata Lorraine Duchess Bavaria (age 25). Coefficient of inbreeding 2.86%.

On 17 Apr 1573 Maximilian "The Great" Wittelsbach I Duke Bavaria I Elector Bavaria was born to William Wittelsbach V Duke Bavaria (age 24) and Renata Lorraine Duchess Bavaria (age 28) at Munich. Coefficient of inbreeding 2.86%.

On 23 Sep 1571 Christine Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 22) and Renata Lorraine Duchess Bavaria (age 27). Coefficient of inbreeding 2.86%.

On 07 Oct 1578 Eleonore Magdalene Wittelsbach was born to William Wittelsbach V Duke Bavaria (age 30) and Renata Lorraine Duchess Bavaria (age 34). Coefficient of inbreeding 2.86%.

On 01 Dec 1844 Alexandra Glücksburg Queen Consort England was born to King Christian IX of Denmark (age 26) and Queen Louise Hesse-Kassel of Denmark (age 27). She a great x 3 granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

On 26 Nov 1847 Dagmar aka Maria Feodrovna Glücksburg was born to King Christian IX of Denmark (age 29) and Queen Louise Hesse-Kassel of Denmark (age 30). She a great x 3 granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

On 24 Dec 1845 George I King Greece was born to King Christian IX of Denmark (age 27) and Queen Louise Hesse-Kassel of Denmark (age 28). He a great x 3 grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

On 03 Jun 1843 Frederick VIII King Denmark was born to King Christian IX of Denmark (age 25) and Queen Louise Hesse-Kassel of Denmark (age 25). He a great x 3 grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

On 27 Oct 1858 Prince Valdemar Glücksburg was born to King Christian IX of Denmark (age 40) and Queen Louise Hesse-Kassel of Denmark (age 41). He a great x 3 grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

On 29 Sep 1853 Thyra Glücksburg Duchess Cumberland and Teviotdale was born to King Christian IX of Denmark (age 35) and Queen Louise Hesse-Kassel of Denmark (age 36). She a great x 3 granddaughter of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.84%.

In 1416 Catherine Montfort was born to John Montfort V Duke Brittany (age 26) and Joan Valois Duchess Brittany (age 24). Coefficient of inbreeding 2.83%.

In 1409 Anne Montfort was born to John Montfort V Duke Brittany (age 19) and Joan Valois Duchess Brittany (age 17). Coefficient of inbreeding 2.83%.

On 14 May 1414 Francis Montfort I Duke Brittany was born to John Montfort V Duke Brittany (age 24) and Joan Valois Duchess Brittany (age 23). Coefficient of inbreeding 2.83%.

In 1412 Margaret Montfort was born to John Montfort V Duke Brittany (age 22) and Joan Valois Duchess Brittany (age 20). Coefficient of inbreeding 2.83%.

In 1420 Gilles Montfort was born to John Montfort V Duke Brittany (age 30) and Joan Valois Duchess Brittany (age 28). Coefficient of inbreeding 2.83%.

In 1418 Peter Montfort II Duke Brittany was born to John Montfort V Duke Brittany (age 28) and Joan Valois Duchess Brittany (age 26). Coefficient of inbreeding 2.83%.

In 1411 Isabella Montfort was born to John Montfort V Duke Brittany (age 21) and Joan Valois Duchess Brittany (age 19). Coefficient of inbreeding 2.83%.

Angharad ap Tegwared Aberffraw was born to Tegwared ap Llywelyn "y Baiswen aka White Mantle" Aberffraw and Gwenllian ferch Ednyfed Fychan Tudor. Coefficient of inbreeding 2.81%.

Arddun ap Tegwared Aberffraw was born to Tegwared ap Llywelyn "y Baiswen aka White Mantle" Aberffraw and Gwenllian ferch Ednyfed Fychan Tudor. Coefficient of inbreeding 2.81%.

Howel ap Tegwared Aberffraw was born to Tegwared ap Llywelyn "y Baiswen aka White Mantle" Aberffraw and Gwenllian ferch Ednyfed Fychan Tudor. Coefficient of inbreeding 2.81%.

Around 1250 Tegwared Vychan ap Tegwared Aberffraw was born to Tegwared ap Llywelyn "y Baiswen aka White Mantle" Aberffraw (age 40) and Gwenllian ferch Ednyfed Fychan Tudor. Coefficient of inbreeding 2.81%.

In 1325 John Burgundy was born to Odo IV Duke Burgundy (age 30) and Joan Capet Duchess Burgundy (age 16). Coefficient of inbreeding 2.81%.

In 1322 Unamed Burgundy was born to Odo IV Duke Burgundy (age 27) and Joan Capet Duchess Burgundy (age 13). Coefficient of inbreeding 2.81%.

On 10 Nov 1323 Philip Burgundy I Count Auvergne was born to Odo IV Duke Burgundy (age 28) and Joan Capet Duchess Burgundy (age 15). Coefficient of inbreeding 2.81%.

On 16 Sep 1541 Walter Devereux 1st Earl Essex was born to Richard Devereux (age 28) and Dorothy Hastings (age 25). Coefficient of inbreeding 2.78%.

In 1346 Philip I Duke Burgundy was born to Philip Burgundy I Count Auvergne (age 22) and Joan Auvergne Queen Consort France (age 19). Coefficient of inbreeding 2.73%.

In 1345 Margaret Burgundy was born to Philip Burgundy I Count Auvergne (age 21) and Joan Auvergne Queen Consort France (age 18). Coefficient of inbreeding 2.73%.

In 1344 Joan Burgundy was born to Philip Burgundy I Count Auvergne (age 20) and Joan Auvergne Queen Consort France (age 17). Coefficient of inbreeding 2.73%.

On 01 Nov 1778 King Gustav IV of Sweden was born to Gustav III King Sweden (age 32) and Queen Sophia of Sweden (age 32). He a great grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.73%.

On 25 Aug 1782 Prince Carl Gustav Duke of Småland was born to Gustav III King Sweden (age 36) and Queen Sophia of Sweden (age 36). He a great grandson of King George II of Great Britain and Ireland. Coefficient of inbreeding 2.73%.

On 11 May 1713 James Drummond 3rd Duke Perth was born to James Drummond 2nd Duke Perth (age 39) and Jane Gordon Duchess Perth (age 22) in Drummond Castle. Coefficient of inbreeding 2.70%.

In 1714 John Drummond 4th Duke Perth was born to James Drummond 2nd Duke Perth (age 40) and Jane Gordon Duchess Perth (age 23) in France. Coefficient of inbreeding 2.70%.

On 17 Sep 1385 Thomas Mowbray 4th Earl Norfolk 2nd Earl Nottingham was born to Thomas Mowbray 1st Duke of Norfolk (age 17) and Elizabeth Fitzalan Duchess Norfolk (age 19). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.69%.

In 1392 John Mowbray 2nd Duke of Norfolk was born to Thomas Mowbray 1st Duke of Norfolk (age 23) and Elizabeth Fitzalan Duchess Norfolk (age 26). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.69%.

In 1388 Margaret Mowbray Baroness Grey Ruthyn was born to Thomas Mowbray 1st Duke of Norfolk (age 19) and Elizabeth Fitzalan Duchess Norfolk (age 22) at Epworth. She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.69%.

In 1394 Elizabeth Mowbray Countess Suffolk was born to Thomas Mowbray 1st Duke of Norfolk (age 25) and Elizabeth Fitzalan Duchess Norfolk (age 28) in Thetford, Norfolk [Map]. She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.69%.

In 1400 Isabel Mowbray Baroness Berkeley was born to Thomas Mowbray 1st Duke of Norfolk and Elizabeth Fitzalan Duchess Norfolk (age 34). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.69%.

On 27 Jun 1430 Henry Holland 3rd Duke Exeter was born to John Holland 2nd Duke Exeter (age 35) and Anne Stafford Duchess Exeter. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.68%.

Anne Holland Countess Douglas and Avondale was born to John Holland 2nd Duke Exeter and Anne Stafford Duchess Exeter. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.68%.

Jeanne of Bar was born to Robert of Bar 1st Duke of Bar and Marie Valois Duchess Bar. She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

Bonne of Bar was born to Robert of Bar 1st Duke of Bar and Marie Valois Duchess Bar. She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1380 John of Bar was born to Robert of Bar 1st Duke of Bar (age 35) and Marie Valois Duchess Bar (age 35). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

Yolande of Bar was born to Robert of Bar 1st Duke of Bar and Marie Valois Duchess Bar. She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

After 1377 Cardinal Louis of Bar was born to Robert of Bar 1st Duke of Bar (age 32) and Marie Valois Duchess Bar (age 32). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In Jun 1377 Edward of Bar III Duke of Bar was born to Robert of Bar 1st Duke of Bar (age 32) and Marie Valois Duchess Bar (age 32). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1365 Yolande of Bar Queen Consort Aragon was born to Robert of Bar 1st Duke of Bar (age 20) and Marie Valois Duchess Bar (age 20). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1374 Marie of Bar was born to Robert of Bar 1st Duke of Bar (age 29) and Marie Valois Duchess Bar (age 29). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1373 Charles of Bar was born to Robert of Bar 1st Duke of Bar (age 28) and Marie Valois Duchess Bar (age 28). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In or after 1364 Henry of Bar was born to Robert of Bar 1st Duke of Bar (age 19) and Marie Valois Duchess Bar (age 19). The date based on tht of his parents marriage; some source give his date of borth as 1362. He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1372 Philippe of Bar was born to Robert of Bar 1st Duke of Bar (age 27) and Marie Valois Duchess Bar (age 27). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.67%.

In 1460 Louise Valois was born to Louis "Father of the People" XI King France (age 36) and Charlotte Savoy Queen Consort France (age 18). Coefficient of inbreeding 2.65%.

On 30 Jun 1470 Charles VIII King France was born to Louis "Father of the People" XI King France (age 46) and Charlotte Savoy Queen Consort France (age 28). Coefficient of inbreeding 2.65%.

On 04 Dec 1466 Louis Valois was born to Louis "Father of the People" XI King France (age 43) and Charlotte Savoy Queen Consort France (age 25). Coefficient of inbreeding 2.65%.

On 23 Apr 1464 Joan Valois Queen Consort France was born to Louis "Father of the People" XI King France (age 40) and Charlotte Savoy Queen Consort France (age 22). Coefficient of inbreeding 2.65%.

On 03 Apr 1461 Anne Valois Duchess Bourbon was born to Louis "Father of the People" XI King France (age 37) and Charlotte Savoy Queen Consort France (age 19). Coefficient of inbreeding 2.65%.

Francis Valois was born to Louis "Father of the People" XI King France and Charlotte Savoy Queen Consort France. Coefficient of inbreeding 2.65%.

On 15 Jul 1459 Joachim Valois was born to Louis "Father of the People" XI King France (age 36) and Charlotte Savoy Queen Consort France (age 17). Coefficient of inbreeding 2.65%.

On 18 Oct 1458 Louis Valois was born to Louis "Father of the People" XI King France (age 35) and Charlotte Savoy Queen Consort France (age 16). Coefficient of inbreeding 2.65%.

In 1392 Blanche Lancaster Elector Palatinate was born to King Henry IV of England (age 24) and Mary Bohun (age 24) at Peterborough Castle [Map]. Coefficient of inbreeding 2.60%.

Before 30 Sep 1388 Thomas Lancaster 1st Duke of Clarence was born to King Henry IV of England (age 21) and Mary Bohun (age 20). Coefficient of inbreeding 2.60%.

On 09 Aug 1386 King Henry V of England was born to King Henry IV of England (age 19) and Mary Bohun (age 18) at Monmouth Castle [Map]. Coefficient of inbreeding 2.60%.

On 03 Oct 1390 Humphrey Lancaster 1st Duke Gloucester was born to King Henry IV of England (age 23) and Mary Bohun (age 22). Coefficient of inbreeding 2.60%.

On 04 Jun 1394 Philippa Lancaster Queen Consort Denmark was born to King Henry IV of England (age 27) and Mary Bohun (age 26) at Peterborough Castle [Map]. His mother (age 26) died in childbirth. She was buried at Church of the Annunciation of our Lady of the Newark [Map]. Coefficient of inbreeding 2.60%.

On 20 Jun 1389 John Lancaster 1st Duke Bedford was born to King Henry IV of England (age 22) and Mary Bohun (age 21). Coefficient of inbreeding 2.60%.

On 22 Apr 1451 Isabella Queen Castile was born to John II King Castile (age 46) and Isabella Aviz Queen Consort Castile (age 23). She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.60%.

On 17 Nov 1453 Alfonso Trastámara was born to John II King Castile (age 48) and Isabella Aviz Queen Consort Castile (age 25). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.60%.

In 1380 Charles Valois was born to Louis Valois Anjou I Duke Anjou (age 40) and Marie Chatillon Duchess Anjou (age 35). Coefficient of inbreeding 2.60%.

On 05 Oct 1377 King Louis of Naples was born to Louis Valois Anjou I Duke Anjou (age 38) and Marie Chatillon Duchess Anjou (age 32) at Toulose. Coefficient of inbreeding 2.60%.

In 1370 Marie Valois Anjou was born to Louis Valois Anjou I Duke Anjou (age 30) and Marie Chatillon Duchess Anjou (age 25). Coefficient of inbreeding 2.60%.

Alexander Livingston 2nd Earl Callendar was born to Alexander Livingston 2nd Earl Linlithgow and Mary Douglas. Coefficient of inbreeding 2.55%.

John Fleming 3rd Earl Wigtown was born to John Fleming 2nd Earl Wigtown and Margaret Livingston Countess Wigtown. Coefficient of inbreeding 2.53%.

Anne Fleming Countess Dalhousie was born to John Fleming 2nd Earl Wigtown and Margaret Livingston Countess Wigtown. Coefficient of inbreeding 2.53%.

Helenor Fleming was born to John Fleming 2nd Earl Wigtown and Margaret Livingston Countess Wigtown. Coefficient of inbreeding 2.53%.

In 1428 Marie Bourbon Duchess Anjou was born to Charles Bourbon I Duke Bourbon (age 27) and Agnes Valois Duchess Bourbon (age 23). Coefficient of inbreeding 2.50%.

In 1430 Philip Bourbon was born to Charles Bourbon I Duke Bourbon (age 29) and Agnes Valois Duchess Bourbon (age 25). Coefficient of inbreeding 2.50%.

In 1434 Charles Bourbon Archbishop Lyons was born to Charles Bourbon I Duke Bourbon (age 33) and Agnes Valois Duchess Bourbon (age 29). Coefficient of inbreeding 2.50%.

In 1426 John Bourbon II Duke Bourbon was born to Charles Bourbon I Duke Bourbon (age 25) and Agnes Valois Duchess Bourbon (age 21). Coefficient of inbreeding 2.50%.

On 01 Dec 1438 Peter Bourbon II Duke Bourbon was born to Charles Bourbon I Duke Bourbon (age 37) and Agnes Valois Duchess Bourbon (age 34). Coefficient of inbreeding 2.50%.

In 1438 Louis Bourbon was born to Charles Bourbon I Duke Bourbon (age 37) and Agnes Valois Duchess Bourbon (age 33). Coefficient of inbreeding 2.50%.

In 1445 James Bourbon was born to Charles Bourbon I Duke Bourbon (age 44) and Agnes Valois Duchess Bourbon (age 40). Coefficient of inbreeding 2.50%.

In 1440 Catherine Bourbon Duchess Guelders was born to Charles Bourbon I Duke Bourbon (age 39) and Agnes Valois Duchess Bourbon (age 35). Coefficient of inbreeding 2.50%.

In 1442 Johanna Bourbon was born to Charles Bourbon I Duke Bourbon (age 41) and Agnes Valois Duchess Bourbon (age 37). Coefficient of inbreeding 2.50%.

In 1436 Isabella Bourbon was born to Charles Bourbon I Duke Bourbon (age 35) and Agnes Valois Duchess Bourbon (age 31). Coefficient of inbreeding 2.50%.

On 05 Feb 1439 Margaret Bourbon was born to Charles Bourbon I Duke Bourbon (age 38) and Agnes Valois Duchess Bourbon (age 34). Coefficient of inbreeding 2.50%.

On 21 May 1653 Eleonora Maria Habsburg Spain was born to Ferdinand King Bohemia III Holy Roman Emperor (age 44) and Eleonora Gonzaga Queen Consort Bohemia (age 23). Coefficient of inbreeding 2.47%.

On 11 Feb 1657 Ferdinand Josef Alois Habsburg Spain Archduchess Austria was born to Ferdinand King Bohemia III Holy Roman Emperor (age 48) and Eleonora Gonzaga Queen Consort Bohemia (age 27). Coefficient of inbreeding 2.47%.

On 27 Mar 1652 Theresia Maria Josefa Habsburg Spain Archduchess Austria was born to Ferdinand King Bohemia III Holy Roman Emperor (age 43) and Eleonora Gonzaga Queen Consort Bohemia (age 22). Coefficient of inbreeding 2.47%.

On 30 Dec 1654 Maria Anna Josepha Habsburg Spain was born to Ferdinand King Bohemia III Holy Roman Emperor (age 46) and Eleonora Gonzaga Queen Consort Bohemia (age 24). Coefficient of inbreeding 2.47%.

On 29 Jul 1356 Martin I King Aragon was born to Peter IV King Aragon (age 36) and Eleanor Barcelona Queen Consort Aragon. Coefficient of inbreeding 2.45%.

On 20 Feb 1358 Eleanor Barcelona Queen Consort Castile was born to Peter IV King Aragon (age 38) and Eleanor Barcelona Queen Consort Aragon. Coefficient of inbreeding 2.45%.

In Jun 1362 Alfonso Barcelona was born to Peter IV King Aragon (age 42) and Eleanor Barcelona Queen Consort Aragon. Coefficient of inbreeding 2.45%.

On 27 Dec 1350 King John I of Aragon was born to Peter IV King Aragon (age 31) and Eleanor Barcelona Queen Consort Aragon. Coefficient of inbreeding 2.45%.

On 20 Aug 1571 Charles Guise I Duke Guise was born to Henry 1st Duke Guise (age 20) and Catherine of Cleves (age 23). Coefficient of inbreeding 2.44%.

On 05 Jun 1578 Claude Guise was born to Henry 1st Duke Guise (age 27) and Catherine of Cleves (age 30). Coefficient of inbreeding 2.44%.

On 25 Oct 1921 Michael Hohenzollern Sigmaringen was born to King Carol II Hohenzollern Sigmaringen (age 28) and Helen Glücksburg (age 25). He a great x 2 grandson of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.43%.

Gil Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Leonor Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

In 1268 Vincent Burgundy was born to Alfonso III King Portugal (age 57) and Beatrice Queen Consort Portugal (age 26). He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

In 1266 Constanza Burgundy was born to Alfonso III King Portugal (age 55) and Beatrice Queen Consort Portugal (age 24). She a great x 2 granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Rodrigo Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Leonor Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

On 02 Feb 1264 Sancha Burgundy was born to Alfonso III King Portugal (age 53) and Beatrice Queen Consort Portugal (age 22). She a great x 2 granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

On 08 Feb 1263 Afonso Burgundy was born to Alfonso III King Portugal (age 52) and Beatrice Queen Consort Portugal (age 21). He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

On 09 Oct 1261 Denis I King Portugal was born to Alfonso III King Portugal (age 51) and Beatrice Queen Consort Portugal (age 19). Denis I King Portugal succeeded I King Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

In 1260 Ferdinand Burgundy was born to Alfonso III King Portugal (age 49) and Beatrice Queen Consort Portugal (age 18). He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

On 25 Feb 1259 Blanche Burgundy was born to Alfonso III King Portugal (age 48) and Beatrice Queen Consort Portugal (age 17). She a great x 2 granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Fernando Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Urraca Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

Henrique Burgundy was born to Alfonso III King Portugal and Beatrice Queen Consort Portugal. He a great x 2 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

On 21 Nov 1264 Maria Burgundy was born to Alfonso III King Portugal (age 54) and Beatrice Queen Consort Portugal (age 22). She a great x 2 granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 2.41%.

John Neville was born to Ralph Neville 2nd Earl of Westmoreland and Elizabeth Percy Countess of Westmoreland. He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 2.41%.

Around 1367 Philippa Talbot Baroness Tiptoft was born to John Talbot (age 30) and Catherine Talbot (age 28) at Richard's Castle, Herefordshire [Map]. Coefficient of inbreeding 2.40%.

Unamed Sinclair was born to William Sinclair 3rd Earl Orkney 1st Earl Caithness and Elizabeth Douglas Countess Buchan and Orkney and Caithness. Coefficient of inbreeding 2.40%.

In 1440 Catherine Sinclair Duchess Albany was born to William Sinclair 3rd Earl Orkney 1st Earl Caithness (age 30) and Elizabeth Douglas Countess Buchan and Orkney and Caithness. Coefficient of inbreeding 2.40%.

In 1436 William Sinclair 2nd Lord Sinclair was born to William Sinclair 3rd Earl Orkney 1st Earl Caithness (age 26) and Elizabeth Douglas Countess Buchan and Orkney and Caithness. Coefficient of inbreeding 2.40%.

On 04 Feb 1337 Louis Bourbon II Duke Bourbon was born to Peter Bourbon Duke Bourbon (age 26) and Isabella Valois Duchess Bourbon (age 24). He a great x 3 grandson of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1347 Isabella Bourbon was born to Peter Bourbon Duke Bourbon (age 36) and Isabella Valois Duchess Bourbon (age 34). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1345 Isabelle Bourbon was born to Peter Bourbon Duke Bourbon (age 34) and Isabella Valois Duchess Bourbon (age 32). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1344 Margaret Bourbon was born to Peter Bourbon Duke Bourbon (age 33) and Isabella Valois Duchess Bourbon (age 31). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1342 Catherine Bourbon was born to Peter Bourbon Duke Bourbon (age 31) and Isabella Valois Duchess Bourbon (age 29). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1341 Bonne Bourbon was born to Peter Bourbon Duke Bourbon (age 30) and Isabella Valois Duchess Bourbon (age 28). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

In 1339 Blanche Bourbon Queen Consort Castile was born to Peter Bourbon Duke Bourbon (age 28) and Isabella Valois Duchess Bourbon (age 26). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

On 03 Feb 1338 Joanna Bourbon Queen Consort France was born to Peter Bourbon Duke Bourbon (age 27) and Isabella Valois Duchess Bourbon (age 25). She a great x 3 granddaughter of King Henry III of England. Coefficient of inbreeding 2.38%.

On 07 Nov 1448 John of York was born to Richard Plantagenet 3rd Duke York (age 37) and Cecily "Rose of Raby" Neville Duchess York (age 33). He died young. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 07 Jul 1447 William of York was born to Richard Plantagenet 3rd Duke York (age 35) and Cecily "Rose of Raby" Neville Duchess York (age 32). He died young. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 21 Oct 1449 George York 1st Duke of Clarence was born to Richard Plantagenet 3rd Duke York (age 38) and Cecily "Rose of Raby" Neville Duchess York (age 34) at Dublin Castle, Dublin. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 02 Oct 1452 Richard was born to Richard Plantagenet 3rd Duke York (age 41) and Cecily "Rose of Raby" Neville Duchess York (age 37) at Fotheringay Castle, Northamptonshire [Map]. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 20 Jul 1455 Ursula of York was born to Richard Plantagenet 3rd Duke York (age 43) and Cecily "Rose of Raby" Neville Duchess York (age 40). She died young. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.38%.

On 10 Feb 1441 Henry of York was born to Richard Plantagenet 3rd Duke York (age 29) and Cecily "Rose of Raby" Neville Duchess York (age 25). He died the same day. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 17 May 1443 Edmund York 1st Earl of Rutland was born to Richard Plantagenet 3rd Duke York (age 31) and Cecily "Rose of Raby" Neville Duchess York (age 28) at Rouen, France [Map]. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 22 Apr 1444 Elizabeth York Duchess Suffolk was born to Richard Plantagenet 3rd Duke York (age 32) and Cecily "Rose of Raby" Neville Duchess York (age 28) at Rouen, France [Map]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.38%.

Around 1451 Thomas of York was born to Richard Plantagenet 3rd Duke York (age 39) and Cecily "Rose of Raby" Neville Duchess York (age 35). He died young. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 10 Aug 1439 Anne York Duchess Exeter was born to Richard Plantagenet 3rd Duke York (age 27) and Cecily "Rose of Raby" Neville Duchess York (age 24) at Fotheringay Castle, Northamptonshire [Map]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.38%.

On 28 Apr 1442 King Edward IV of England was born to Richard Plantagenet 3rd Duke York (age 30) and Cecily "Rose of Raby" Neville Duchess York (age 26) at Rouen, France [Map]. He was immediately baptised in a small side chapel at Rouen Cathedral [Map]. Some historians suggest the lack of grandeur indicates Edward IV may have been illegitimate whereas others suggest the baptism was typical for a country at war. Some historians also suggest Edward IV was illegitimate since his father Richard Plantagenet 3rd Duke York (age 30) was away at the siege of Pontoise [Map] at the time of conception. Pontoise [Map] is some sixty miles from Rouen. There is straight road, an old Roman road known as the Chaussée Jules César, between the Pontoise and Rouen, now known as the D14. Easy for Richard to return to Rouen as and when he chose to. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.38%.

On 03 May 1446 Margaret of York Duchess of Burgundy was born to Richard Plantagenet 3rd Duke York (age 34) and Cecily "Rose of Raby" Neville Duchess York (age 31) at Fotheringay Castle, Northamptonshire [Map]. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.38%.

On 16 Jun 1653 James Bertie 1st Earl of Abingdon was born to Montagu Bertie 2nd Earl Lindsey (age 45) and Bridget Wray Countess Lindsey (age 26). Coefficient of inbreeding 2.35%.

Edward Bertie was born to Montagu Bertie 2nd Earl Lindsey and Bridget Wray Countess Lindsey. Coefficient of inbreeding 2.35%.

In 1655 Mary Bertie Countess Carnarvon was born to Montagu Bertie 2nd Earl Lindsey (age 47) and Bridget Wray Countess Lindsey (age 28). Coefficient of inbreeding 2.35%.

Around 1656 Henry Bertie was born to Montagu Bertie 2nd Earl Lindsey (age 48) and Bridget Wray Countess Lindsey (age 29). Coefficient of inbreeding 2.35%.

On 11 Jan 1807 Joseph York was born to Joseph Yorke (age 42) and Catherine Cocks. Coefficient of inbreeding 2.34%.

On 13 Oct 1799 Philip James Yorke was born to Philip Yorke (age 29) and Anna Maria Cocks (age 26). Coefficient of inbreeding 2.34%.

Anna Maria Yorke Lady Head was born to Philip Yorke and Anna Maria Cocks. Coefficient of inbreeding 2.34%.

In 1339 Juana Manuel Queen of Castile was born to Juan Manuel Prince of Villena (age 56) and Blanca de la Cerda y Lara (age 22). Coefficient of inbreeding 2.34%.

In 1554 Jean Fleming Countess Cassilis was born to James Fleming 4th Lord Fleming (age 20) and Barbara Hamilton Lady Fleming. Coefficient of inbreeding 2.33%.

On 14 May 1666 Victor Amadeus King Sardinia was born to Charles Emmanuel II Duke of Savoy (age 31) and Marie Jeanne Baptiste of Savoy (age 22). Coefficient of inbreeding 2.29%.

In 1315 Joan Capet was born to Charles IV King France I King Navarre (age 20) and Blanche of Burgundy Queen Consort France (age 18). Coefficient of inbreeding 2.29%.

In Jan 1314 Philip Capet was born to Charles IV King France I King Navarre (age 19) and Blanche of Burgundy Queen Consort France (age 17). Coefficient of inbreeding 2.29%.

On 01 May 1308 Joan Capet Duchess Burgundy was born to Philip V King France I King Navarre (age 15) and Joan of Burgundy Queen Consort France (age 16). Coefficient of inbreeding 2.29%.

In 1310 Isabelle Capet was born to Philip V King France I King Navarre (age 17) and Joan of Burgundy Queen Consort France (age 18). Coefficient of inbreeding 2.29%.

In 1313 Blanche Capet was born to Philip V King France I King Navarre (age 20) and Joan of Burgundy Queen Consort France (age 21). Coefficient of inbreeding 2.29%.

On 24 Jun 1316 Philip Capet was born to Philip V King France I King Navarre (age 23) and Joan of Burgundy Queen Consort France (age 24). Coefficient of inbreeding 2.29%.

In 1309 Margaret Capet Countess Nevers amd Flanders was born to Philip V King France I King Navarre (age 16) and Joan of Burgundy Queen Consort France (age 17). Coefficient of inbreeding 2.29%.

On 12 Jan 1562 Charles Emmanuel Savoy I Duke Savoy was born to Emmanuel Philibert Duke of Savoy (age 33) and Margaret Valois Duchess Berry and Savoy (age 38). Coefficient of inbreeding 2.29%.

Henry York was born to Richard of Conisbrough 1st Earl Cambridge and Anne Mortimer. He a great grandson of King Edward III of England. Coefficient of inbreeding 2.28%.

On 21 Sep 1411 Richard Plantagenet 3rd Duke York was born to Richard of Conisbrough 1st Earl Cambridge (age 26) and Anne Mortimer (age 20). His mother died shortly afterwards. He a great grandson of King Edward III of England. Coefficient of inbreeding 2.28%.

In 1409 Isabel York Countess Eu and Essex was born to Richard of Conisbrough 1st Earl Cambridge (age 23) and Anne Mortimer (age 18). She a great granddaughter of King Edward III of England. Coefficient of inbreeding 2.28%.

On 08 Sep 1496 Charles Valois was born to Charles VIII King France (age 26) and Anne of Brittany Queen Consort France (age 19). Coefficient of inbreeding 2.26%.

In Jul 1497 Francis Valois was born to Charles VIII King France (age 27) and Anne of Brittany Queen Consort France (age 20). Coefficient of inbreeding 2.26%.

In Mar 1494 Unamed1 Valois was born to Charles VIII King France (age 23) and Anne of Brittany Queen Consort France (age 17). Coefficient of inbreeding 2.26%.

In Aug 1493 Francis Valois was born to Charles VIII King France (age 23) and Anne of Brittany Queen Consort France (age 16). Coefficient of inbreeding 2.26%.

On 11 Oct 1492 Charles Valois was born to Charles VIII King France (age 22) and Anne of Brittany Queen Consort France (age 15). Coefficient of inbreeding 2.26%.

On 20 Mar 1498 Anne Valois was born to Charles VIII King France (age 27) and Anne of Brittany Queen Consort France (age 21). Coefficient of inbreeding 2.26%.

In Mar 1495 Unamed2 Valois was born to Charles VIII King France (age 24) and Anne of Brittany Queen Consort France (age 18). Coefficient of inbreeding 2.26%.

On 06 Aug 1775 Duke Louis Antoine of Angoulême was born to King Charles X of France (age 17) and Maria Teresa of Savoy (age 19). Coefficient of inbreeding 2.24%.

Around 1442 Joan Stafford Viscountess Beaumont was born to Humphrey Stafford 1st Duke of Buckingham (age 39) and Anne Neville Duchess Buckingham (age 34). She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.23%.

Around 1425 Humphrey Stafford was born to Humphrey Stafford 1st Duke of Buckingham (age 22) and Anne Neville Duchess Buckingham (age 17). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

On 24 Nov 1427 John Stafford 1st Earl Wiltshire was born to Humphrey Stafford 1st Duke of Buckingham (age 25) and Anne Neville Duchess Buckingham (age 19). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

William Stafford was born to Humphrey Stafford 1st Duke of Buckingham and Anne Neville Duchess Buckingham. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

George Stafford was born to Humphrey Stafford 1st Duke of Buckingham and Anne Neville Duchess Buckingham. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

Around 1425 Henry Stafford was born to Humphrey Stafford 1st Duke of Buckingham (age 22) and Anne Neville Duchess Buckingham (age 17). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

In 1437 Catherine Stafford Countess Shrewsbury and Waterford was born to Humphrey Stafford 1st Duke of Buckingham (age 34) and Anne Neville Duchess Buckingham (age 29). She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.23%.

In 1446 Anne Stafford Baroness Cobham Sternborough was born to Humphrey Stafford 1st Duke of Buckingham (age 43) and Anne Neville Duchess Buckingham (age 38). She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.23%.

Edward Stafford was born to Humphrey Stafford 1st Duke of Buckingham and Anne Neville Duchess Buckingham. He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.23%.

Margaret Stafford was born to Humphrey Stafford 1st Duke of Buckingham and Anne Neville Duchess Buckingham. She a great x 2 granddaughter of King Edward III of England. Coefficient of inbreeding 2.23%.

In 1548 Anne Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 34) and Catherine Pole Countess Huntingdon (age 37). Coefficient of inbreeding 2.23%.

In 1544 Walter Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 30) and Catherine Pole Countess Huntingdon (age 33) in Braunston, Leicestershire. Coefficient of inbreeding 2.23%.

On 11 Aug 1542 Catherine Hastings Countess Lincoln was born to Francis Hastings 2nd Earl Huntingdon (age 28) and Catherine Pole Countess Huntingdon (age 31). Coefficient of inbreeding 2.23%.

In 1541 Edward Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 27) and Catherine Pole Countess Huntingdon (age 30) at Ashby-de-la-Zouch, Leicestershire. Coefficient of inbreeding 2.23%.

In 1540 George Hastings 4th Earl Huntingdon was born to Francis Hastings 2nd Earl Huntingdon (age 26) and Catherine Pole Countess Huntingdon (age 29). Coefficient of inbreeding 2.23%.

In 1552 Mary Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 38) and Catherine Pole Countess Huntingdon (age 41). Coefficient of inbreeding 2.23%.

Around 1550 Francis Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 36) and Catherine Pole Countess Huntingdon (age 39). Coefficient of inbreeding 2.23%.

In 1533 Frances Hastings Baroness Compton was born to Francis Hastings 2nd Earl Huntingdon (age 19) and Catherine Pole Countess Huntingdon (age 22). Coefficient of inbreeding 2.23%.

Around 1535 Henry Hastings 3rd Earl Huntingdon was born to Francis Hastings 2nd Earl Huntingdon (age 21) and Catherine Pole Countess Huntingdon (age 24) at Ashby-de-la-Zouch, Leicestershire. Coefficient of inbreeding 2.23%.

In 1537 William Hastings was born to Francis Hastings 2nd Earl Huntingdon (age 23) and Catherine Pole Countess Huntingdon (age 26). Coefficient of inbreeding 2.23%.

Around 1546 Elizabeth Hastings Countess of Worcester was born to Francis Hastings 2nd Earl Huntingdon (age 32) and Catherine Pole Countess Huntingdon (age 35). Coefficient of inbreeding 2.23%.

On 16 Aug 1355 Philippa Plantagenet Countess March 5th Countess Ulster was born to Lionel Plantagenet 1st Duke of Clarence (age 16) and Elizabeth Burgh Duchess of Clarence (age 23) at Eltham Palace, Kent [Map]. At the time of her birth she was Heir to the Throne of England since her uncle Edward "Black Prince" (age 25) was yet to be married. She a granddaughter of King Edward III of England. Coefficient of inbreeding 2.22%.

On 19 Sep 1457 Marie Valois Viscountess Narbonne was born to Charles Valois Duke Orléans (age 62) and Mary La Marck Duchess Orléans. Some sources say 19 Dec 1457. Coefficient of inbreeding 2.19%.

On 27 Jun 1462 Louis XII King France was born to Charles Valois Duke Orléans (age 67) and Mary La Marck Duchess Orléans. Coefficient of inbreeding 2.19%.

In 1464 Anne Orléans Valois Orléans Abbess Fontevraud was born to Charles Valois Duke Orléans (age 69) and Mary La Marck Duchess Orléans. Coefficient of inbreeding 2.19%.

Charles Dampierre was born to Louis Dampierre III Count Nevers II Count Flanders and Margaret Brabant Countess Nevers and Flanders. He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.19%.

Peter Dampierre was born to Louis Dampierre III Count Nevers II Count Flanders and Margaret Brabant Countess Nevers and Flanders. He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.19%.

In 1348 Margaret Dampierre Duchess Burgundy was born to Louis Dampierre III Count Nevers II Count Flanders (age 17) and Margaret Brabant Countess Nevers and Flanders (age 24). She a great x 2 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.19%.

Louis Chatillon II Count Blois I Count Chatillon was born to Guy Chatillon I Count Blois and Margaret of France Queen Consort England. Coefficient of inbreeding 2.18%.

On 13 Nov 1312 King Edward III of England was born to King Edward II of England (age 28) and Isabella of France Queen Consort England (age 17) at Windsor Castle [Map]. He was christened on 17 Nov 1312 with Archbishop Walter Reynolds being one of his godfathers. Coefficient of inbreeding 2.16%.

On 05 Jul 1321 Joan of the Tower Queen Consort Scotland was born to King Edward II of England (age 37) and Isabella of France Queen Consort England (age 26) at the Tower of London [Map]. Coefficient of inbreeding 2.16%.

On 18 Jun 1318 Eleanor of Woodstock Plantagenet was born to King Edward II of England (age 34) and Isabella of France Queen Consort England (age 23) at Woodstock Palace, Oxfordshire [Map]. She was named for her paternal grandmother Eleanor of Castile. Coefficient of inbreeding 2.16%.

On 15 Aug 1316 John of Eltham 1st Earl Cornwall was born to King Edward II of England (age 32) and Isabella of France Queen Consort England (age 21) at Eltham Palace, Kent [Map]. Coefficient of inbreeding 2.16%.

Alexei Holstein Gottorp Romanov was born to Tsar Nicholas II of Russia and Alix aka Alexandra Hesse Darmstadt. He a great grandson of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.16%.

On 26 Jun 1899 Maria Holstein Gottorp Romanov was born to Tsar Nicholas II of Russia (age 31) and Alix aka Alexandra Hesse Darmstadt (age 27). She a great granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.16%.

On 15 Nov 1895 Olga Holstein Gottorp Romanov was born to Tsar Nicholas II of Russia (age 27) and Alix aka Alexandra Hesse Darmstadt (age 23). She a great granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.16%.

On 10 Jun 1897 Tatiana Holstein Gottorp Romanov was born to Tsar Nicholas II of Russia (age 29) and Alix aka Alexandra Hesse Darmstadt (age 25). She a great granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.16%.

Anastasia Holstein Gottorp Romanov was born to Tsar Nicholas II of Russia and Alix aka Alexandra Hesse Darmstadt. She a great granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 2.16%.

On 06 Mar 1405 John II King Castile was born to Henry III King Castile (age 25) and Catherine of Lancaster Queen Consort Castile (age 31). He a great grandson of King Edward III of England. Coefficient of inbreeding 2.15%.

On 14 Sep 1401 Maria Trastámara Queen Consort Aragon was born to Henry III King Castile (age 21) and Catherine of Lancaster Queen Consort Castile (age 28). She a great granddaughter of King Edward III of England. Coefficient of inbreeding 2.15%.

In 1403 Catherine Trastámara was born to Henry III King Castile (age 23) and Catherine of Lancaster Queen Consort Castile (age 29). She a great granddaughter of King Edward III of England. Coefficient of inbreeding 2.15%.

Mary Talbot Countess Northumberland was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

In 1500 Francis Talbot 5th Earl of Shrewsbury was born to George Talbot 4th Earl of Shrewsbury (age 32) and Anne Hastings Countess Shrewsbury and Waterford (age 29). Coefficient of inbreeding 2.14%.

Margaret Talbot Baroness Clifford was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

Around 1507 Elizabeth Talbot Baroness Dacre Gilsland was born to George Talbot 4th Earl of Shrewsbury (age 39) and Anne Hastings Countess Shrewsbury and Waterford (age 36). Coefficient of inbreeding 2.14%.

Dorothy Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

Richard Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

John Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

William Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

Henry Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

John Talbot was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford. Coefficient of inbreeding 2.14%.

Around 1293 Philip V King France I King Navarre was born to Philip "The Fair" IV King France (age 24) and Joan Blois I Queen Navarre (age 19). Coefficient of inbreeding 2.10%.

In 1295 Isabella of France Queen Consort England was born to Philip "The Fair" IV King France (age 26) and Joan Blois I Queen Navarre (age 21). Coefficient of inbreeding 2.10%.

On 19 Jun 1294 Charles IV King France I King Navarre was born to Philip "The Fair" IV King France (age 26) and Joan Blois I Queen Navarre (age 21). Coefficient of inbreeding 2.10%.

On 04 Oct 1289 Louis X King France I Navarre was born to Philip "The Fair" IV King France (age 21) and Joan Blois I Queen Navarre (age 16). Coefficient of inbreeding 2.10%.

On 20 Jun 1634 Charles Emmanuel II Duke of Savoy was born to Victor Amadeus I Duke of Savoy (age 47) and Christine Marie Bourbon Duchess Savoy (age 28). Coefficient of inbreeding 2.09%.

On 22 Jul 1478 Philip "Handsome Fair" King Castile was born to Maximilian Habsburg I Holy Roman Emperor (age 19) and Mary Valois Duchess Burgundy (age 21). Coefficient of inbreeding 2.07%.

In 1481 Francis Habsburg was born to Maximilian Habsburg I Holy Roman Emperor (age 21) and Mary Valois Duchess Burgundy (age 23). Coefficient of inbreeding 2.07%.

In 1480 Margaret Habsburg Princess Asturias was born to Maximilian Habsburg I Holy Roman Emperor (age 20) and Mary Valois Duchess Burgundy (age 22). Coefficient of inbreeding 2.07%.

On 18 Oct 1444 John Mowbray 4th Duke of Norfolk was born to John Mowbray 3rd Duke of Norfolk (age 29) and Eleanor Bourchier Duchess Norfolk (age 27). He a great x 2 grandson of King Edward III of England. Coefficient of inbreeding 2.07%.

On 18 Dec 1736 Friederike Sophie Dorothea Hohenzollern was born to Friedrich Wilhelm Hohenzollern (age 36) and Sophia Dorothea Hohenzollern (age 17). She a great granddaughter of King George I of Great Britain and Ireland. Coefficient of inbreeding 2.05%.

On 22 Apr 1738 Princess Elisabeth Louise Hohenzollern was born to Friedrich Wilhelm Hohenzollern (age 37) and Sophia Dorothea Hohenzollern (age 19). She a great granddaughter of King George I of Great Britain and Ireland. Coefficient of inbreeding 2.05%.

On 10 Oct 1745 Princess Philippine Hohenzollern was born to Friedrich Wilhelm Hohenzollern (age 44) and Sophia Dorothea Hohenzollern (age 26). She a great granddaughter of King George I of Great Britain and Ireland. Coefficient of inbreeding 2.05%.

On 03 May 1749 Prince George Frederick Hohenzollern was born to Friedrich Wilhelm Hohenzollern (age 48) and Sophia Dorothea Hohenzollern (age 30). He a great grandson of King George I of Great Britain and Ireland. Coefficient of inbreeding 2.05%.

On 10 Sep 1741 Prince George Philip Hohenzollern was born to Friedrich Wilhelm Hohenzollern (age 40) and Sophia Dorothea Hohenzollern (age 22). He a great grandson of King George I of Great Britain and Ireland. Coefficient of inbreeding 2.05%.

In 1464 Dietrich La Marck was born to John La Marck I Duke Cleves (age 44) and Elizabeth Valois Duchess Cleves (age 25). Coefficient of inbreeding 2.05%.

On 26 Sep 1462 Engelbert La Marck Count Nevers was born to John La Marck I Duke Cleves (age 43) and Elizabeth Valois Duchess Cleves (age 23). Coefficient of inbreeding 2.05%.

In 1465 Marie La Marck was born to John La Marck I Duke Cleves (age 45) and Elizabeth Valois Duchess Cleves (age 26). Coefficient of inbreeding 2.05%.

In 1467 Philip La Marck was born to John La Marck I Duke Cleves (age 47) and Elizabeth Valois Duchess Cleves (age 28). Coefficient of inbreeding 2.05%.

In 1461 Adolf La Marck was born to John La Marck I Duke Cleves (age 41) and Elizabeth Valois Duchess Cleves (age 22). Coefficient of inbreeding 2.05%.

On 13 Apr 1458 John "Babymaker" La Marck II Duke Cleves was born to John La Marck I Duke Cleves (age 39) and Elizabeth Valois Duchess Cleves (age 19). Coefficient of inbreeding 2.05%.

On 11 Apr 1492 Marguerite Valois Orléans Queen Consort Navarre was born to Charles Valois Orléans Count Angoulême (age 33) and Louise of Savoy Countess Angoulême (age 15). Coefficient of inbreeding 2.02%.

On 12 Sep 1494 King Francis I of France was born to Charles Valois Orléans Count Angoulême (age 35) and Louise of Savoy Countess Angoulême (age 18). Coefficient of inbreeding 2.02%.

On 08 Nov 1344 Robert of Bar 1st Duke of Bar was born to Henry of Bar IV Count of Bar and Yolande Dampierre Countess of Bar (age 13). He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.02%.

In 1339 Edward of Bar II Count of Bar was born to Henry of Bar IV Count of Bar (age 24) and Yolande Dampierre Countess of Bar (age 8). He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 2.02%.

On 07 Mar 1558 Duke John VII of Mecklenburg-Schwerin was born to Duke John Albert I of Mecklenburg-Schwerin (age 32) and Anna Sophia Hohenzollern (age 30). Coefficient of inbreeding 2.02%.

Around 1641 George Seton 4th Earl Winton was born to George Seton Master of Seton (age 27) and Henrietta Gordon Countess Traquair. Coefficient of inbreeding 2.01%.

On 15 Aug 1171 Alfonso IX King Leon was born to Ferdinand II King Leon (age 34) and Urraca Burgundy Queen Consort Leon (age 23). Coefficient of inbreeding 2.00%.

On 29 Aug 1321 John "Sans Terre" Artois 1st Count Eu was born to Robert III Artois (age 34) and Joan Valois Countess Zeeland Holland Avesnes and Hainault (age 27). He a great x 2 grandson of King Henry III of England. Coefficient of inbreeding 1.98%.

In 1320 Louis Artois was born to Robert III Artois (age 33) and Joan Valois Countess Zeeland Holland Avesnes and Hainault (age 26). He a great x 2 grandson of King Henry III of England. Coefficient of inbreeding 1.98%.

On 11 Jun 1527 Anna Sophia Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 37) and Dorothea Oldenburg (age 22). Coefficient of inbreeding 1.98%.

In Mar 1539 Albert Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 48) and Dorothea Oldenburg (age 34). Coefficient of inbreeding 1.98%.

On 03 Feb 1537 Lucia Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 46) and Dorothea Oldenburg (age 32). Coefficient of inbreeding 1.98%.

On 08 Apr 1531 Lucia Dorothea Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 40) and Dorothea Oldenburg (age 26). Coefficient of inbreeding 1.98%.

On 05 Dec 1529 Frederick Albert Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 39) and Dorothea Oldenburg (age 25). Coefficient of inbreeding 1.98%.

On 24 Feb 1528 Katharina Hohenzollern was born to Albert "The Elder" Hohenzollern I Duke Prussia (age 37) and Dorothea Oldenburg (age 23). She died the same day. Coefficient of inbreeding 1.98%.

On 14 Aug 1688 Frederick William "Soldier King" I King Prussia was born to Frederick I King Prussia (age 31) and Sophia Charlotte Hanover Queen Consort Prussia (age 19). He a great x 2 grandson of King James I of England and Ireland and VI of Scotland. Coefficient of inbreeding 1.96%.

In 1685 Frederick August Hohenzollern was born to Frederick I King Prussia (age 27) and Sophia Charlotte Hanover Queen Consort Prussia (age 16). He a great x 2 grandson of King James I of England and Ireland and VI of Scotland. Coefficient of inbreeding 1.96%.

On 09 Oct 1935 Edward Windsor 2nd Duke Kent was born to Prince George Windsor 1st Duke Kent (age 32) and Princess Marina Glücksburg Duchess Kent (age 28). He a grandson of George V King United Kingdom. Coefficient of inbreeding 1.96%.

On 25 Dec 1936 Alexandra Windsor was born to Prince George Windsor 1st Duke Kent (age 34) and Princess Marina Glücksburg Duchess Kent (age 30). She a granddaughter of George V King United Kingdom. Coefficient of inbreeding 1.96%.

On 04 Jul 1942 Michael Windsor was born to Prince George Windsor 1st Duke Kent (age 39) and Princess Marina Glücksburg Duchess Kent (age 35). He a grandson of George V King United Kingdom. Coefficient of inbreeding 1.96%.

In 1625 Marie Valois Duchess Nemours was born to Henri Valois II Duke Longueville (age 29) and Louise Bourbon Condé Duchess Longueville (age 21). Coefficient of inbreeding 1.96%.

Joan Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Catherine Piers Power Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

In 1631 Elizabeth Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory (age 72) and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Around 1581 Thomas Butler Viscount Thurles was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory (age 22) and Helen Butler Countess Ormonde and Ossory against his father's (age 22) wishes. Coefficient of inbreeding 1.96%.

Ellen Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Ellis Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Helena Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

John Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Mary Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Margaret Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

Eleanor Butler was born to Walter Butler 11th Earl Ormonde 4th Earl Ossory and Helen Butler Countess Ormonde and Ossory. Coefficient of inbreeding 1.96%.

On 24 Jul 1542 Isobel Kennedy was born to Gilbert Kennedy 3rd Earl Cassilis (age 27) and Margaret Kennedy Countess Cassilis (age 28). Coefficient of inbreeding 1.95%.

Jean Kennedy Countess Orkney was born to Gilbert Kennedy 3rd Earl Cassilis and Margaret Kennedy Countess Cassilis. Coefficient of inbreeding 1.95%.

Around 1545 Thomas Kennedy of Culzean was born to Gilbert Kennedy 3rd Earl Cassilis (age 29) and Margaret Kennedy Countess Cassilis (age 31). Coefficient of inbreeding 1.95%.

Katherine Kennedy was born to Gilbert Kennedy 3rd Earl Cassilis and Margaret Kennedy Countess Cassilis. Coefficient of inbreeding 1.95%.

Around 1541 Gilbert Kennedy 4th Earl Cassilis was born to Gilbert Kennedy 3rd Earl Cassilis (age 25) and Margaret Kennedy Countess Cassilis (age 27). Coefficient of inbreeding 1.95%.

In 1430 Isabelle Armagnac was born to John IV Count Armagnac (age 33) and Isabella Évreux Countess Armagnac (age 35). Coefficient of inbreeding 1.94%.

In 1423 Eléonore Armagnac was born to John IV Count Armagnac (age 26) and Isabella Évreux Countess Armagnac (age 28). Coefficient of inbreeding 1.94%.

In 1420 Marie Armagnac Duchess Alençon was born to John IV Count Armagnac (age 23) and Isabella Évreux Countess Armagnac (age 25). Coefficient of inbreeding 1.94%.

In 1420 Jean V Count Armagnac was born to John IV Count Armagnac (age 23) and Isabella Évreux Countess Armagnac (age 25). Coefficient of inbreeding 1.94%.

In 1425 Charles Armagnac I Count Armagnac was born to John IV Count Armagnac (age 28) and Isabella Évreux Countess Armagnac (age 30). Coefficient of inbreeding 1.94%.

Gorm Glücksburg was born to Harald Glücksburg and Helene Adelheid Viktoria Marie Glücksburg. Coefficient of inbreeding 1.93%.

Caroline Mathilde Glücksburg was born to Harald Glücksburg and Helene Adelheid Viktoria Marie Glücksburg. Coefficient of inbreeding 1.93%.

Oluf Glücksburg was born to Harald Glücksburg and Helene Adelheid Viktoria Marie Glücksburg. Coefficient of inbreeding 1.93%.

Alexandrine Louise Glücksburg was born to Harald Glücksburg and Helene Adelheid Viktoria Marie Glücksburg. Coefficient of inbreeding 1.93%.

Feodora Glücksburg was born to Harald Glücksburg and Helene Adelheid Viktoria Marie Glücksburg. Coefficient of inbreeding 1.93%.

Before 1534 Margaret Scrope was born to John Scrope 8th Baron Scrope of Bolton (age 23) and Catherine Clifford Baroness Scrope Bolton (age 20). Coefficient of inbreeding 1.93%.

Around 1534 Henry Scrope 9th Baron Scrope of Bolton was born to John Scrope 8th Baron Scrope of Bolton (age 24) and Catherine Clifford Baroness Scrope Bolton (age 21). Coefficient of inbreeding 1.93%.

In 1416 Bonne Armagnac was born to John IV Count Armagnac (age 19) and Blanche Montfort Countess Armagnac (age 19). Coefficient of inbreeding 1.93%.

On 10 May 1509 Edward Stanley 3rd Earl of Derby was born to Thomas Stanley 2nd Earl of Derby (age 24) and Anne Hastings Countess Derby (age 24). Coefficient of inbreeding 1.91%.

Margaret Stanley Countess Sussex was born to Thomas Stanley 2nd Earl of Derby and Anne Hastings Countess Derby. Coefficient of inbreeding 1.91%.

In or after 1510 John Stanley was born to Thomas Stanley 2nd Earl of Derby (age 25) and Anne Hastings Countess Derby (age 25). Coefficient of inbreeding 1.91%.

On 21 Dec 1800 Duchess Louise Dorothea of Saxe Coburg Altenburg was born to Duke Augustus of Saxe Coburg Altenburg (age 28) and Louise Charlotte Mecklenburg-Schwerin (age 21) at Gotha. Coefficient of inbreeding 1.90%.

Around 1300 Elizabeth Verdun Baroness Burghesh was born to Theobald Verdun 2nd Lord Verdun (age 21) and Maud Mortimer Lady Verdun (age 14) at Alton, Cheadle, Staffordshire. Coefficient of inbreeding 1.90%.

On 10 Aug 1310 Margaret Verdun Baroness Hussey was born to Theobald Verdun 2nd Lord Verdun (age 31) and Maud Mortimer Lady Verdun (age 24) at Alton Castle, Staffordshire. Coefficient of inbreeding 1.90%.

Around 1305 John Verdun was born to Theobald Verdun 2nd Lord Verdun (age 26) and Maud Mortimer Lady Verdun (age 19) at Ludlow, Shropshire [Map]. Coefficient of inbreeding 1.90%.

On 09 Aug 1303 Joan Verdun Baroness Furnivall was born to Theobald Verdun 2nd Lord Verdun (age 24) and Maud Mortimer Lady Verdun (age 17) at Wooton, Stanton Lacy. Coefficient of inbreeding 1.90%.

Around 1304 William Verdun was born to Theobald Verdun 2nd Lord Verdun (age 25) and Maud Mortimer Lady Verdun (age 18) at Ludlow, Shropshire [Map]. Coefficient of inbreeding 1.90%.

In 1307 Theobald Verdun 3rd Lord Verdun was born to Theobald Verdun 2nd Lord Verdun (age 28) and Maud Mortimer Lady Verdun (age 21). Coefficient of inbreeding 1.90%.

John Seton was born to Robert Seton 1st Earl Winton and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

In 1588 Alexander Seton aka Montgomerie 6th Earl Eglinton was born to Robert Seton 1st Earl Winton (age 35) and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

On 30 Nov 1593 Isabel Seton was born to Robert Seton 1st Earl Winton (age 40) and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

Thomas Seton was born to Robert Seton 1st Earl Winton and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

Before Apr 1584 Robert Seton 2nd Earl Winton was born to Robert Seton 1st Earl Winton (age 31) and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

In Dec 1584 George Seton 3rd Earl Winton was born to Robert Seton 1st Earl Winton (age 31) and Margaret Montgomerie Countess Winton. Coefficient of inbreeding 1.89%.

On 15 Dec 1588 Duke Adolphus Frederick I of Mecklenburg-Schwerin was born to Duke John VII of Mecklenburg-Schwerin (age 30) and Sophia Oldenburg (age 19). Coefficient of inbreeding 1.89%.

On 05 May 1590 Duke John Albert II of Mecklenburg was born to Duke John VII of Mecklenburg-Schwerin (age 32) and Sophia Oldenburg (age 20). Coefficient of inbreeding 1.89%.

In 1531 Hugh Montgomerie 3rd Earl Eglinton was born to Hugh Montgomerie 2nd Earl Eglinton and Marion Seton Countess Eglinton (age 36). Coefficient of inbreeding 1.88%.

Eleanor of Bar Duchess Lorraine was born to Edward of Bar and Mary Burgundy. She a great granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.85%.

Beatrice Bar was born to Edward of Bar and Mary Burgundy. She a great granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.85%.

Around 1315 Henry of Bar IV Count of Bar was born to Edward of Bar and Mary Burgundy (age 17). He a great grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.85%.

On 31 Oct 1934 Margaretha Bernadotte was born to Gustaf Adolf Bernadotte (age 28) and Sibylla Saxe Coburg Gotha (age 26). She a great x 2 granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 1.85%.

On 30 Apr 1946 Carl XVI King Sweden was born to Gustaf Adolf Bernadotte (age 40) and Sibylla Saxe Coburg Gotha (age 38). He a great x 2 grandson of Queen Victoria of the United Kingdom. Coefficient of inbreeding 1.85%.

On 02 Jun 1938 Désiré Bernadotte was born to Gustaf Adolf Bernadotte (age 32) and Sibylla Saxe Coburg Gotha (age 30). She a great x 2 granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 1.85%.

On 03 Aug 1943 Christina Bernadotte was born to Gustaf Adolf Bernadotte (age 37) and Sibylla Saxe Coburg Gotha (age 35). She a great x 2 granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 1.85%.

On 19 Jan 1937 Birgitta Bernadotte was born to Gustaf Adolf Bernadotte (age 30) and Sibylla Saxe Coburg Gotha (age 29). She a great x 2 granddaughter of Queen Victoria of the United Kingdom. Coefficient of inbreeding 1.85%.

In 1157 Margaret Capet was born to Louis VII King Franks (age 37) and Constance of Castile (age 17). Coefficient of inbreeding 1.85%.

On 04 Oct 1160 Alys Capet Countess Ponthieu was born to Louis VII King Franks (age 40) and Constance of Castile (age 20). Coefficient of inbreeding 1.85%.

Around 1468 George Talbot 4th Earl of Shrewsbury was born to John Talbot 3rd Earl of Shrewsbury (age 19) and Catherine Stafford Countess Shrewsbury and Waterford (age 31) at Shifnal Manor, Shropshire. He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 1.85%.

In 1472 Anne Talbot was born to John Talbot 3rd Earl of Shrewsbury (age 23) and Catherine Stafford Countess Shrewsbury and Waterford (age 35). He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 1.85%.

In 1470 Thomas Talbot was born to John Talbot 3rd Earl of Shrewsbury (age 21) and Catherine Stafford Countess Shrewsbury and Waterford (age 33). He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 1.85%.

On 23 Jun 1894 King Edward VIII of the United Kingdom was born to George V King United Kingdom (age 29) and Victoria Mary Teck Queen Consort England (age 27). Coefficient of inbreeding 1.84%.

On 20 Dec 1902 Prince George Windsor 1st Duke Kent was born to George V King United Kingdom (age 37) and Victoria Mary Teck Queen Consort England (age 35) at York Cottage, Sandringham Estate. Coefficient of inbreeding 1.84%.

On 31 Mar 1900 Henry Windsor 1st Duke Gloucester was born to George V King United Kingdom (age 34) and Victoria Mary Teck Queen Consort England (age 32) at York Cottage, Sandringham Estate. Coefficient of inbreeding 1.84%.

On 25 Apr 1897 Princess Mary Windsor Countess Harewood was born to George V King United Kingdom (age 31) and Victoria Mary Teck Queen Consort England (age 29). Coefficient of inbreeding 1.84%.

On 12 Jul 1905 John Windsor was born to George V King United Kingdom (age 40) and Victoria Mary Teck Queen Consort England (age 38). Coefficient of inbreeding 1.84%.

Dorothea Stewart Countess Tullibardine was born to John Stewart 5th Earl Atholl and Mary Ruthven Countess Atholl. Coefficient of inbreeding 1.83%.

Anne Stewart Baroness Castle Stuart was born to John Stewart 5th Earl Atholl and Mary Ruthven Countess Atholl. Coefficient of inbreeding 1.83%.

Mary Stewart was born to John Stewart 5th Earl Atholl and Mary Ruthven Countess Atholl. Coefficient of inbreeding 1.83%.

Around 1524 Anne Somerset was born to Henry Somerset 2nd Earl of Worcester (age 28) and Margaret Courtenay Countess of Worcester (age 25). She a great granddaughter of King Edward IV of England. Coefficient of inbreeding 1.83%.

On 31 Mar 1697 Charles Stewart 5th Earl Traquair was born to Charles Stewart 4th Earl Traquair (age 38) and Mary Maxwell Countess Traquair (age 26). Coefficient of inbreeding 1.83%.

On 04 Mar 1705 Catherine Stewart was born to Charles Stewart 4th Earl Traquair (age 46) and Mary Maxwell Countess Traquair (age 34). Coefficient of inbreeding 1.83%.

On 11 Aug 1702 Mary Stewart was born to Charles Stewart 4th Earl Traquair (age 43) and Mary Maxwell Countess Traquair (age 31). Coefficient of inbreeding 1.83%.

On 03 Feb 1699 John Stewart 6th Earl Traquair was born to Charles Stewart 4th Earl Traquair (age 40) and Mary Maxwell Countess Traquair (age 28). Coefficient of inbreeding 1.83%.

On 02 May 1631 John Murray 1st Marquess Atholl was born to John Murray 1st Earl Atholl and Jean Campbell Countess Atholl. Coefficient of inbreeding 1.83%.

Anne Murray Countess Tullibardine was born to John Murray 1st Earl Atholl and Jean Campbell Countess Atholl. Coefficient of inbreeding 1.83%.

On 23 Dec 1544 Anna of Saxony was born to Maurice Elector of Saxony (age 23) and Agnes of Hesse (age 17). Coefficient of inbreeding 1.82%.

In 1230 Alan VI Viscount Rohan was born to Alan V Viscount Rohan (age 25) and Aliénor de Porhoët Viscountess Rohan (age 30). He a great x 3 grandson of King Henry I "Beauclerc" England. Coefficient of inbreeding 1.79%.

Around 1338 Hugh Despencer was born to Edward Despencer (age 28) and Anne Ferrers (age 39) at Collyweston, Northamptonshire [Map]. He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.78%.

Thomas Despencer was born to Edward Despencer and Anne Ferrers. He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.78%.

Around 1341 Bishop Henry Despencer was born to Edward Despencer (age 31) and Anne Ferrers (age 42). He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.78%.

On 24 Mar 1335 Edward Despencer 1st Baron Despencer, Baron Burghesh was born to Edward Despencer (age 25) and Anne Ferrers (age 36) at Essendine Ryall, Rutlandshire. He a great x 2 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.78%.

Edward Hamilton was born to John Hamilton 1st Marquess Hamilton and Margaret Lyon Marchioness Hamilton. Coefficient of inbreeding 1.78%.

In 1589 James Hamilton 2nd Marquess Hamilton was born to John Hamilton 1st Marquess Hamilton (age 54) and Margaret Lyon Marchioness Hamilton. Coefficient of inbreeding 1.78%.

Margaret Hamilton Lady Maxwell was born to John Hamilton 1st Marquess Hamilton and Margaret Lyon Marchioness Hamilton. Coefficient of inbreeding 1.78%.

In 1484 Anna Foix Queen Consort of Hungary and Bohemia was born to Gaston de Foix 2nd Earl Kendal (age 36) and Catherine of Foix Countess Kendal (age 29). Coefficient of inbreeding 1.78%.

Around 1477 Bishop Alexander Stewart was born to Alexander Stewart 1st Duke Albany (age 23) and Catherine Sinclair Duchess Albany (age 37). Coefficient of inbreeding 1.78%.

Thomas Clifford was born to Thomas Clifford 8th Baron Clifford and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

Around 1437 Roger Clifford was born to Thomas Clifford 8th Baron Clifford (age 22) and Joan Dacre Baroness Clifford at Conisbrough Castle [Map]. Coefficient of inbreeding 1.77%.

In 1436 Elizabeth Clifford was born to Thomas Clifford 8th Baron Clifford (age 21) and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

Robert Clifford was born to Thomas Clifford 8th Baron Clifford and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

Around 1442 Maud Clifford was born to Thomas Clifford 8th Baron Clifford (age 27) and Joan Dacre Baroness Clifford at Conisbrough Castle [Map]. Coefficient of inbreeding 1.77%.

In 1447 Anne Clifford was born to Thomas Clifford 8th Baron Clifford (age 32) and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

On 08 Apr 1435 John "Butcher" Clifford 9th Baron Clifford was born to Thomas Clifford 8th Baron Clifford (age 21) and Joan Dacre Baroness Clifford at Conisbrough Castle [Map]. Coefficient of inbreeding 1.77%.

In 1446 Margaret Clifford was born to Thomas Clifford 8th Baron Clifford (age 31) and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

Joan Clifford was born to Thomas Clifford 8th Baron Clifford and Joan Dacre Baroness Clifford. Coefficient of inbreeding 1.77%.

On 27 Jun 1791 Chandos Leigh 1st Baron Leigh was born to James Henry Leigh of Adlestrop (age 26) and Julia Judith Twisleton (age 19). Coefficient of inbreeding 1.76%.

On 29 Jul 1609 Maria Gonzaga Duchess of Montferrat was born to Francesco IV Gonzaga Duke of Mantua (age 23) and Margaret of Savoy Vicereine Portugal (age 20). Coefficient of inbreeding 1.75%.

On 02 May 1451 René Lorraine II Duke Lorraine Duke of Bar was born to Frederick Lorraine Count Vaudémont (age 23) and Yolande Valois Anjou (age 22) at Angers [Map]. Coefficient of inbreeding 1.75%.

In 1463 Margaret Lorraine Duchess Alençon was born to Frederick Lorraine Count Vaudémont (age 35) and Yolande Valois Anjou (age 34). Coefficient of inbreeding 1.75%.

Peter Lorraine was born to Frederick Lorraine Count Vaudémont and Yolande Valois Anjou. Coefficient of inbreeding 1.75%.

In 1458 Joan Lorraine Duchess Anjou was born to Frederick Lorraine Count Vaudémont (age 30) and Yolande Valois Anjou (age 29). Coefficient of inbreeding 1.75%.

Nicholas Lorraine was born to Frederick Lorraine Count Vaudémont and Yolande Valois Anjou. Coefficient of inbreeding 1.75%.

Yolande Lorraine was born to Frederick Lorraine Count Vaudémont and Yolande Valois Anjou. Coefficient of inbreeding 1.75%.

Louis Chatillon was born to Guy Chatillon II Count Blois and Marie Dampierre Countess Blois. Coefficient of inbreeding 1.75%.

In 1513 Richard Devereux was born to Walter Devereux 1st Viscount Hereford (age 25) and Mary Grey Baroness Ferrers Chartley (age 22). Coefficient of inbreeding 1.74%.

Around 1525 William Devereux of Merevale was born to Walter Devereux 1st Viscount Hereford (age 37) and Mary Grey Baroness Ferrers Chartley (age 34). Coefficient of inbreeding 1.74%.

In Jun 1282 Gwenllian "Lady of Wales" Aberffraw was born to Llewellyn "Last" Aberffraw (age 49) and Eleanor Montfort Princess of Wales (age 30) at Abergwyngregyn Bangor. She a great granddaughter of King John "Lackland" of England. Coefficient of inbreeding 1.74%.

In 1904 Elizabeth Glücksburg was born to Prince Nicholas Glücksburg (age 31) and Elena Vladimirovna Holstein Gottorp Romanov (age 22). Coefficient of inbreeding 1.72%.

On 11 Jun 1903 Olga Glücksburg was born to Prince Nicholas Glücksburg (age 31) and Elena Vladimirovna Holstein Gottorp Romanov (age 21) in Athens. Coefficient of inbreeding 1.72%.

On 13 Dec 1906 Princess Marina Glücksburg Duchess Kent was born to Prince Nicholas Glücksburg (age 34) and Elena Vladimirovna Holstein Gottorp Romanov (age 24) at Athens. Coefficient of inbreeding 1.72%.

In 1404 Margaret Beauchamp Countess Shrewsbury and Waterford was born to Richard Beauchamp 13th Earl Warwick (age 21) and Elizabeth Berkeley Countess Warwick (age 18). Coefficient of inbreeding 1.71%.

In Sep 1408 Eleanor Beauchamp Duchess Somerset was born to Richard Beauchamp 13th Earl Warwick (age 26) and Elizabeth Berkeley Countess Warwick (age 22) at Wedgenock, Oxfordshire. Coefficient of inbreeding 1.71%.

In 1417 Elizabeth Beauchamp Baroness Latimer was born to Richard Beauchamp 13th Earl Warwick (age 34) and Elizabeth Berkeley Countess Warwick (age 31). Coefficient of inbreeding 1.71%.

Around 1056 Hildegarde Burgundy Duchess Aquitaine was born to Robert I Duke Burgundy (age 45) and Ermengarde Blanche Ingelger Duchess Burgundy (age 38). Coefficient of inbreeding 1.71%.

Around 1510 John Scrope 8th Baron Scrope of Bolton was born to Henry Scrope 7th Baron Scrope of Bolton (age 28) and Mabel Dacre Baroness Scrope Bolton (age 20). Coefficient of inbreeding 1.70%.

Joan Scrope Baroness Lumley was born to Henry Scrope 7th Baron Scrope of Bolton and Mabel Dacre Baroness Scrope Bolton. Coefficient of inbreeding 1.70%.

On 06 May 1851 William Legge 6th Earl Dartmouth was born to William Legge 5th Earl Dartmouth (age 27) and Augusta Finch Countess Dartmouth (age 29). Coefficient of inbreeding 1.69%.

On 04 Nov 1852 Henry Charles Legge was born to William Legge 5th Earl Dartmouth (age 29) and Augusta Finch Countess Dartmouth (age 30). Coefficient of inbreeding 1.69%.

In 1614 John Fortescue 2nd Baronet was born to John Fortescue 1st Baronet (age 22) and Frances Stanley Lady Fortescue. Coefficient of inbreeding 1.69%.

Around 1615 Edward Fortescue was born to John Fortescue 1st Baronet (age 23) and Frances Stanley Lady Fortescue. Coefficient of inbreeding 1.69%.

On 18 Oct 1885 Margaret Harriet Trefusis was born to Colonel Walter Rodolph Trefusis (age 47) and Mary Charlotte Montagu-Douglas-Scott (age 34). Coefficient of inbreeding 1.69%.

On 03 Aug 1882 Marion Gertrude Trefusis Countess Leicester was born to Colonel Walter Rodolph Trefusis (age 44) and Mary Charlotte Montagu-Douglas-Scott (age 30). Coefficient of inbreeding 1.69%.

On 03 Feb 1879 Adela Mary Charlotte Trefusis was born to Colonel Walter Rodolph Trefusis (age 41) and Mary Charlotte Montagu-Douglas-Scott (age 27). Coefficient of inbreeding 1.69%.

On 12 May 1880 Eva Mary Louise Trefusis was born to Colonel Walter Rodolph Trefusis (age 42) and Mary Charlotte Montagu-Douglas-Scott (age 28). Coefficient of inbreeding 1.69%.

On 25 Jun 1881 Katherine Helen Elizabeth Trefusis was born to Colonel Walter Rodolph Trefusis (age 43) and Mary Charlotte Montagu-Douglas-Scott (age 29). Coefficient of inbreeding 1.69%.

In 1469 Anne Grey was born to Thomas Grey (age 23) and Margaret Greystoke (age 27). Coefficient of inbreeding 1.68%.

In 1762 Margaret Gordon was born to Charles Gordon 4th Earl Aboyne (age 36) and Margaret Stewart Countess Aboyne. Her birth date is usually stated as 1763 but since her mother died on 12 Aug 1762 we have adjusted Margaret Gordon's birth year to 1762. Coefficient of inbreeding 1.68%.

On 28 Jun 1761 George Gordon 9th Marquess Huntly was born to Charles Gordon 4th Earl Aboyne (age 35) and Margaret Stewart Countess Aboyne. Coefficient of inbreeding 1.68%.

In 1760 Catherine Gordon was born to Charles Gordon 4th Earl Aboyne (age 34) and Margaret Stewart Countess Aboyne. Coefficient of inbreeding 1.68%.

On 27 Jun 1871 Blanche Harriet Egerton was born to Francis Leveson-Gower aka Egerton (age 46) and Louisa Caroline Cavendish (age 36). Coefficient of inbreeding 1.68%.

On 01 Mar 1868 William Francis Leveson-Gower was born to Francis Leveson-Gower aka Egerton (age 43) and Louisa Caroline Cavendish (age 32). Coefficient of inbreeding 1.68%.

John Hamilton 2nd Lord of Bargeny was born to John Hamilton 1st Lord of Bargeny and Jean Douglas. Coefficient of inbreeding 1.67%.

On 20 Sep 1843 Nicoholas Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 25) and Maria Alexandrovna Hesse Darmstadt (age 19). Coefficient of inbreeding 1.67%.

On 10 Mar 1845 Tsar Alexander III of Russia was born to Tsar Alexander II of Russia (age 26) and Maria Alexandrovna Hesse Darmstadt (age 20). Coefficient of inbreeding 1.67%.

On 22 Apr 1847 Vladimir Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 28) and Maria Alexandrovna Hesse Darmstadt (age 22). Coefficient of inbreeding 1.67%.

On 30 Aug 1842 Alexandra "Lina" Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 24) and Maria Alexandrovna Hesse Darmstadt (age 18). Coefficient of inbreeding 1.67%.

On 14 Jan 1850 Alexei Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 31) and Maria Alexandrovna Hesse Darmstadt (age 25). Coefficient of inbreeding 1.67%.

On 17 Oct 1853 Maria Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 35) and Maria Alexandrovna Hesse Darmstadt (age 29). Coefficient of inbreeding 1.67%.

On 11 May 1857 Sergei Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 39) and Maria Alexandrovna Hesse Darmstadt (age 32). Coefficient of inbreeding 1.67%.

On 03 Oct 1860 Paul Holstein Gottorp Romanov was born to Tsar Alexander II of Russia (age 42) and Maria Alexandrovna Hesse Darmstadt (age 36). Coefficient of inbreeding 1.67%.

In 1384 Joan Plantagenet Baroness Strange, and Talbot was born to Thomas of Woodstock 1st Duke of Gloucester (age 28) and Eleanor Bohun Duchess Gloucester (age 18). She a granddaughter of King Edward III of England. Coefficient of inbreeding 1.67%.

Around 1381 Humphrey Plantagenet 2nd Earl Buckingham was born to Thomas of Woodstock 1st Duke of Gloucester (age 25) and Eleanor Bohun Duchess Gloucester (age 15). He a grandson of King Edward III of England. Coefficient of inbreeding 1.67%.

On 12 Mar 1385 Isabel Plantagenet was born to Thomas of Woodstock 1st Duke of Gloucester (age 30) and Eleanor Bohun Duchess Gloucester (age 19). She a granddaughter of King Edward III of England. Coefficient of inbreeding 1.67%.

In 1388 Philippa Plantagenet was born to Thomas of Woodstock 1st Duke of Gloucester (age 32) and Eleanor Bohun Duchess Gloucester (age 22). She a granddaughter of King Edward III of England. Coefficient of inbreeding 1.67%.

Around 1383 Anne of Gloucester Plantagenet Countess Eu and Stafford was born to Thomas of Woodstock 1st Duke of Gloucester (age 27) and Eleanor Bohun Duchess Gloucester (age 17). She a granddaughter of King Edward III of England. Coefficient of inbreeding 1.67%.

On 16 Dec 1724 William Douglas 4th Duke Queensberry was born to William Douglas 2nd Earl March (age 28) and Anne Hamilton 2nd Countess Ruglen (age 28). Coefficient of inbreeding 1.66%.

Around 1316 Constanza Manuel Queen Consort Castile was born to Juan Manuel Prince of Villena (age 33) and Constance Barcelona. Coefficient of inbreeding 1.66%.

On 17 Oct 1945 Peter David Clegg-Hill 9th Viscount Hill was born to Frederic Raymond Clegg-Hill and Alice Dorothy Chapman posthumously. Coefficient of inbreeding 1.66%.

John Bourbon was born to John Bourbon II Duke Bourbon and Catherine Armagnac Duchess Bourbon. Coefficient of inbreeding 1.65%.

In 1647 Philip Wharton was born to Thomas Wharton (age 31) and Mary Carey (age 31). Coefficient of inbreeding 1.65%.

On 28 Jan 1838 Edward Cavendish was born to William Cavendish 7th Duke Devonshire (age 29) and Blanche Georgiana Howard Duchess Devonshire (age 26) at Marylebone. Coefficient of inbreeding 1.65%.

On 23 Jul 1833 Spencer Cavendish 8th Duke Devonshire was born to William Cavendish 7th Duke Devonshire (age 25) and Blanche Georgiana Howard Duchess Devonshire (age 21). Coefficient of inbreeding 1.65%.

On 08 Oct 1831 William Cavendish was born to William Cavendish 7th Duke Devonshire (age 23) and Blanche Georgiana Howard Duchess Devonshire (age 19). Coefficient of inbreeding 1.65%.

On 16 Mar 1835 Louisa Caroline Cavendish was born to William Cavendish 7th Duke Devonshire (age 26) and Blanche Georgiana Howard Duchess Devonshire (age 23). Coefficient of inbreeding 1.65%.

On 30 Nov 1836 Frederick Charles Cavendish was born to William Cavendish 7th Duke Devonshire (age 28) and Blanche Georgiana Howard Duchess Devonshire (age 24) at Compton Place Eastbourne. Coefficient of inbreeding 1.65%.

Around 1240 Elizabeth Ferrers was born to William Ferrers 5th Earl of Derby (age 47) and Margaret Quincy Countess Derby. Date adjusted from Before 1230 to be consistent with her son Anselm's birth in 1237. Coefficient of inbreeding 1.65%.

In 1239 Robert Ferrers 6th Earl of Derby was born to William Ferrers 5th Earl of Derby (age 46) and Margaret Quincy Countess Derby at Tutbury Castle, Staffordshire [Map]. Coefficient of inbreeding 1.65%.

Agnes Ferrers was born to William Ferrers 5th Earl of Derby and Margaret Quincy Countess Derby. Coefficient of inbreeding 1.65%.

Joan Ferrers Baroness Berkeley was born to William Ferrers 5th Earl of Derby and Margaret Quincy Countess Derby. Coefficient of inbreeding 1.65%.

Around 1240 William Ferrers was born to William Ferrers 5th Earl of Derby (age 47) and Margaret Quincy Countess Derby at Groby, Leicestershire. Coefficient of inbreeding 1.65%.

In 1511 Catherine Pole Countess Huntingdon was born to Henry Pole 1st Baron Montagu (age 19) and Jane Neville Baroness Montagu (age 30). Coefficient of inbreeding 1.65%.

Thomas Pole was born to Henry Pole 1st Baron Montagu and Jane Neville Baroness Montagu. Coefficient of inbreeding 1.65%.

After 1520 Henry Pole was born to Henry Pole 1st Baron Montagu (age 28) and Jane Neville Baroness Montagu (age 39). Coefficient of inbreeding 1.65%.

Around 1525 Winifred Pole was born to Henry Pole 1st Baron Montagu (age 33) and Jane Neville Baroness Montagu (age 44). Coefficient of inbreeding 1.65%.

Lucy Pole was born to Henry Pole 1st Baron Montagu and Jane Neville Baroness Montagu. Coefficient of inbreeding 1.65%.

On 19 Feb 1721 Francis Scott was born to Francis Scott 2nd Duke Buccleuch (age 26) and Jane Douglas. He a great x 2 grandson of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.65%.

In 1270 Alfonso Ivrea was born to Ferdinand de la Cerda Ivrea (age 14) and Blanche Capet (age 17). He a great x 3 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 1.64%.

In 1275 Ferdinando de la Cerda was born to Ferdinand de la Cerda Ivrea (age 19) and Blanche Capet (age 22). He a great x 3 grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 1.64%.

On 27 Nov 1833 Princess Mary Adelaide Hanover was born to Adolphus Hanover 1st Duke Cambridge (age 59) and Princess Augusta Hesse-Kassel Duchess Cambridge (age 36) at Hanover Lower Saxony. She a granddaughter of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.

Augusta Hanover was born to Adolphus Hanover 1st Duke Cambridge and Princess Augusta Hesse-Kassel Duchess Cambridge. She a granddaughter of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.

On 26 Mar 1819 Prince George Hanover 2nd Duke Cambridge was born to Adolphus Hanover 1st Duke Cambridge (age 45) and Princess Augusta Hesse-Kassel Duchess Cambridge (age 21) at Cambridge House, Hanover, Lower Saxony. He a grandson of King George III of Great Britain and Ireland. Coefficient of inbreeding 1.64%.

In 1591 Philip Mainwaring was born to Randulph Mainwaring of Over Peover (age 18) and Jane Smythe. Coefficient of inbreeding 1.64%.

Around 1595 Thomas Smith of Hatherton in Cheshire was born to Laurence Smith of Hatherton in Cheshire (age 25) and Anne Mainwaring (age 23). Coefficient of inbreeding 1.64%.

On 17 Jun 1860 George Espec John Manners was born to George John Manners (age 39) and Adeliza Matilda Fitzalan (age 31). Coefficient of inbreeding 1.64%.

On 26 Sep 1858 Charles George Edmund John Manners was born to George John Manners (age 38) and Adeliza Matilda Fitzalan (age 29). Coefficient of inbreeding 1.64%.

On 21 Nov 1856 Cicely Elizabeth Adeliza Manners was born to George John Manners (age 36) and Adeliza Matilda Fitzalan (age 27). Coefficient of inbreeding 1.64%.

On 20 Aug 1864 Frances Geraldine Manners was born to George John Manners (age 44) and Adeliza Matilda Fitzalan (age 35). Coefficient of inbreeding 1.64%.

On 27 Feb 1866 Fitzalan George John Manners was born to George John Manners (age 45) and Adeliza Matilda Fitzalan (age 37). Coefficient of inbreeding 1.64%.

Maude Plunkett was born to Christopher Plunkett 6th Baron Killeen and Ellice Barnewell. Coefficient of inbreeding 1.64%.

On 12 Jun 1653 Maria Amalia of Courland Landgravine Hesse-Kassel was born to Jacob Kettler (age 42) and Louise Charlotte Hohenzollern (age 35). Coefficient of inbreeding 1.63%.

Charles Arundel was born to William Arundell and Mary Browne. Coefficient of inbreeding 1.63%.

Around 1560 Thomas Arundell 1st Baron Arundel was born to Matthew Arundell (age 27) and Margaret Willoughby (age 17). Coefficient of inbreeding 1.63%.

After 22 Oct 1627 Mary Adundell Lady Tichborne was born to William Arundell (age 41) and Mary Browne (age 34). Coefficient of inbreeding 1.63%.

On 22 Dec 1951 Gerald Cavendish Grosvenor 6th Duke Westminster was born to Robert George Grosvenor 5th Duke Westminster (age 41) and Viola Maud Lyttelton Duchess Westminster (age 39). Coefficient of inbreeding 1.63%.

On 01 Feb 1949 Leonora Mary Grosvenor Countess Lichfield was born to Robert George Grosvenor 5th Duke Westminster (age 38) and Viola Maud Lyttelton Duchess Westminster (age 36). Coefficient of inbreeding 1.63%.

On 08 Feb 1953 Jane Meriel Grosvenor Duchess Roxburghe was born to Robert George Grosvenor 5th Duke Westminster (age 42) and Viola Maud Lyttelton Duchess Westminster (age 40). Coefficient of inbreeding 1.63%.

In 1448 Elizabeth Grey was born to Edmund Grey 1st Earl Kent (age 31) and Katherine Percy (age 24) in Ruthyn. She a great x 3 granddaughter of King Edward III of England. Coefficient of inbreeding 1.63%.

In 1454 George Grey 2nd Earl Kent was born to Edmund Grey 1st Earl Kent (age 37) and Katherine Percy (age 30). He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 1.63%.

In or before 1453 Anthony Grey was born to Edmund Grey 1st Earl Kent (age 36) and Katherine Percy (age 29). He a great x 3 grandson of King Edward III of England. Coefficient of inbreeding 1.63%.

Around 1450 Anne Grey Baroness Grey Wilton was born to Edmund Grey 1st Earl Kent (age 33) and Katherine Percy (age 26) in Ruthyn. She a great x 3 granddaughter of King Edward III of England. Coefficient of inbreeding 1.63%.

On 06 Feb 1804 George Augustus Spencer was born to Francis Almeric Spencer 1st Baron Churchill (age 24) and Frances Fitzroy Baroness Churchill Wychwood (age 23). Coefficient of inbreeding 1.63%.

In 1802 Francis George Spencer 2nd Baron Churchill was born to Francis Almeric Spencer 1st Baron Churchill (age 22) and Frances Fitzroy Baroness Churchill Wychwood (age 21). Coefficient of inbreeding 1.63%.

On 09 Sep 1824 Reverend Charles Frederick Octavius Spencer was born to Francis Almeric Spencer 1st Baron Churchill (age 44) and Frances Fitzroy Baroness Churchill Wychwood (age 44). Coefficient of inbreeding 1.63%.

On 10 Jun 1817 Robert Spencer was born to Francis Almeric Spencer 1st Baron Churchill (age 37) and Frances Fitzroy Baroness Churchill Wychwood (age 37). Coefficient of inbreeding 1.63%.

On 12 Apr 1810 Reverend William Henry Spencer was born to Francis Almeric Spencer 1st Baron Churchill (age 30) and Frances Fitzroy Baroness Churchill Wychwood (age 29). Coefficient of inbreeding 1.63%.

On 25 Mar 1807 Augustus Almeric Spencer was born to Francis Almeric Spencer 1st Baron Churchill (age 27) and Frances Fitzroy Baroness Churchill Wychwood (age 26). Coefficient of inbreeding 1.63%.

In 1381 Reginald Cobham 3rd Baron Cobham was born to Reginald Cobham 2nd Baron Cobham (age 32) and Eleanor Maltravers 2nd Baroness Maltravers Baroness Arundel and Cobham (age 36) at Sterborough Castle, Kent. Coefficient of inbreeding 1.62%.

Around 1512 Elizabeth Willoughby 11th Baroness Latimer 3rd Baroness Willoughby Broke was born to Edward Willoughby (age 21) and Margaret Neville (age 17). Coefficient of inbreeding 1.62%.

On 29 Feb 1528 Albert V Wittelsbach V Duke Bavaria was born to William Wittelsbach IV Duke Bavaria (age 34) and Marie Jakobaea Baden Duchess Bavaria (age 20). Coefficient of inbreeding 1.61%.

In 1379 Bonne Valois was born to Philip "Bold" Valois II Duke Burgundy (age 36) and Margaret Dampierre Duchess Burgundy (age 31). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

In Aug 1384 Anthony Valois Duke Brabant was born to Philip "Bold" Valois II Duke Burgundy (age 42) and Margaret Dampierre Duchess Burgundy (age 36). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

In Oct 1374 Margaret Valois Countess Holland was born to Philip "Bold" Valois II Duke Burgundy (age 32) and Margaret Dampierre Duchess Burgundy (age 26). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

On 12 Jul 1532 Mechthild Wittelsbach was born to William Wittelsbach IV Duke Bavaria (age 38) and Marie Jakobaea Baden Duchess Bavaria (age 25). Coefficient of inbreeding 1.61%.

In Apr 1378 Catherine Valois Duchess Austria was born to Philip "Bold" Valois II Duke Burgundy (age 36) and Margaret Dampierre Duchess Burgundy (age 30). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

On 17 Feb 1529 Wilhelm Wittelsbach was born to William Wittelsbach IV Duke Bavaria (age 35) and Marie Jakobaea Baden Duchess Bavaria (age 21). Coefficient of inbreeding 1.61%.

In Sep 1386 Mary Valois Countess Savoy was born to Philip "Bold" Valois II Duke Burgundy (age 44) and Margaret Dampierre Duchess Burgundy (age 38). She a great x 3 granddaughter of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

On 28 May 1371 John "Fearless" Valois Duke Burgundy was born to Philip "Bold" Valois II Duke Burgundy (age 29) and Margaret Dampierre Duchess Burgundy (age 23). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

In Oct 1389 Philip Valois II Count Nevers was born to Philip "Bold" Valois II Duke Burgundy (age 47) and Margaret Dampierre Duchess Burgundy (age 41). He a great x 3 grandson of King Edward "Longshanks" I of England. Coefficient of inbreeding 1.61%.

On 10 Feb 1526 Theodor Wittelsbach was born to William Wittelsbach IV Duke Bavaria (age 32) and Marie Jakobaea Baden Duchess Bavaria (age 18). Coefficient of inbreeding 1.61%.

Before 1570 John Stewart was born to Andrew Stewart Master of Ochiltree (age 29) and Margaret Stewart. Coefficient of inbreeding 1.61%.

In 1560 Andrew Stewart 1st Baron Castle Stuart was born to Andrew Stewart Master of Ochiltree (age 20) and Margaret Stewart. Coefficient of inbreeding 1.61%.

Around 1532 Catherine Throckmorton was born to Robert Throckmorton (age 19) and Muriel Berkeley (age 15). Coefficient of inbreeding 1.61%.

Mary Throckmorton was born to Robert Throckmorton and Muriel Berkeley. Coefficient of inbreeding 1.61%.

Thomas Throckmorton was born to Robert Throckmorton and Muriel Berkeley. Coefficient of inbreeding 1.61%.

In 1540 Anne Throckmorton was born to Robert Throckmorton (age 27) and Muriel Berkeley (age 23). Coefficient of inbreeding 1.61%.

In 1535 Elizabeth Throckmorton was born to Robert Throckmorton (age 22) and Muriel Berkeley (age 18). Coefficient of inbreeding 1.61%.

Andrew Stewart 3rd Baron Castle Stuart was born to Andrew Stewart 2nd Baron Castle Stuart and Anne Stewart Baroness Castle Stuart. Coefficient of inbreeding 1.60%.

On or before 15 Oct 1635 Josias Stewart 4th Baron Castle Stuart was born to Andrew Stewart 2nd Baron Castle Stuart (age 45) and Anne Stewart Baroness Castle Stuart. Coefficient of inbreeding 1.60%.

On 12 Jun 1811 Margaret Harriet Montagu Scott Countess Romney was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 39) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 37). Coefficient of inbreeding 1.60%.

On 13 Jul 1809 John Douglas Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 37) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 35). Coefficient of inbreeding 1.60%.

On 13 Aug 1814 Harriet Janet Sarah Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 42) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 40). Coefficient of inbreeding 1.60%.

On 24 Oct 1800 Isabella Mary Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 28) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 26). Coefficient of inbreeding 1.60%.

On 02 Jan 1798 George Henry Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 25) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 24). Coefficient of inbreeding 1.60%.

On 17 Aug 1796 Anne Elizabeth Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 24) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 22). Coefficient of inbreeding 1.60%.

On 04 Dec 1803 Katherine Frances Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 31) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 30). Coefficient of inbreeding 1.60%.

Walter Scott 5th Duke Buccleuch 7th Duke Queensberry was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury. Coefficient of inbreeding 1.60%.

On 16 Jul 1799 Charlotte Albinia Montagu Scott was born to Charles Scott 4th Duke Buccleuch 6th Duke Queensberry (age 27) and Harriet Katherine Townshend Duchess Buccleuch Duchess Queensbury (age 25). Coefficient of inbreeding 1.60%.

Around 1566 Joane Ogle Countess Shrewsbury and Waterford was born to Cuthbert Ogle 7th Baron Ogle (age 26) and Catherine Carnaby Baroness Ogle (age 23). She a great x 3 granddaughter of King Edward IV of England. Coefficient of inbreeding 1.60%.

Around 1570 Catherine Ogle 8th Baroness Ogle was born to Cuthbert Ogle 7th Baron Ogle (age 30) and Catherine Carnaby Baroness Ogle (age 27). She a great x 3 granddaughter of King Edward IV of England. Coefficient of inbreeding 1.60%.

In 1390 Robert of Bar Count Soissons Count Marle was born to Henry of Bar (age 25) and Marie de Coucy Countess Soissons (age 23). He a great grandson of King Edward III of England. Coefficient of inbreeding 1.60%.

Enguerrand of Bar was born to Henry of Bar and Marie de Coucy Countess Soissons. He a great grandson of King Edward III of England. Coefficient of inbreeding 1.60%.

Charles Montagu of Papplewick was born to James Montagu and Tufton Wray. Coefficient of inbreeding 1.59%.

Around 1574 John Graham 6th Earl Menteith was born to William Graham 5th Earl Menteith (age 23) and Margaret Douglas Countess Menteith (age 36). Coefficient of inbreeding 1.59%.

On 02 Jun 1410 William Valois was born to Anthony Valois Duke Brabant (age 25) and Elisabeth of Görlitz Duchess Brabant (age 19). Coefficient of inbreeding 1.59%.

In 1487 Elizabeth Longford was born to Ralph Longford (age 55) and Mabel Ferrers (age 49). Coefficient of inbreeding 1.59%.

Around 1478 Ralph Longford was born to Ralph Longford (age 46) and Mabel Ferrers (age 40). Coefficient of inbreeding 1.59%.

In 1480 Margaret Longford was born to Ralph Longford (age 48) and Mabel Ferrers (age 42) at Longford [Map]. Coefficient of inbreeding 1.59%.

Margery Longford was born to Ralph Longford and Mabel Ferrers Coefficient of inbreeding 1.59%.

In Mar 1562 Nicholas Strange was born to Hamon Strange and Elizabeth Hastings (age 29) at Hunstanton, Norfolk. Coefficient of inbreeding 1.59%.

Before 1388 Elizabeth Lindsay was born to David Lindsay 1st Earl Crawford (age 27) and Elizabeth Stewart Countess Crawford (age 25). Coefficient of inbreeding 1.59%.

Alexander Lindsay 2nd Earl Crawford was born to David Lindsay 1st Earl Crawford and Elizabeth Stewart Countess Crawford. Coefficient of inbreeding 1.59%.

On 17 Jul 1502 Janet Stewart Lady Fleming was born illegitimately to King James IV of Scotland (age 29) and Isobel Stewart. Coefficient of inbreeding 1.58%.

In 1512 John Cotton was born to Robert Cotton (age 33) and Dorothy Clere (age 32). Coefficient of inbreeding 1.58%.

On 16 Jun 1881 Ruth Seymour was born to Ernest James Seymour (age 31) and Georgiana Seymour Fortescue (age 29). Coefficient of inbreeding 1.58%.

George Henry Frederick Berkeley was born to George Cranfield Berkeley and Emily Charlotte Lennox. He a great x 3 grandson of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.58%.

On 18 Jun 1795 Mary Caroline Berkeley Duchess Grafton was born to George Cranfield Berkeley (age 41) and Emily Charlotte Lennox (age 31). She a great x 3 granddaughter of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.58%.

Georgina Mary Berkeley was born to George Cranfield Berkeley and Emily Charlotte Lennox. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.58%.

On 14 Jun 1888 Hugh William Fortescue 5th Earl Fortescue was born to Hugh Fortescue 4th Earl Fortescue (age 34) and Emily Ormsby-Gore Countess Fortescue (age 28). Coefficient of inbreeding 1.58%.

On 13 Jun 1893 Denzil George Fortescue 6th Earl Fortescue was born to Hugh Fortescue 4th Earl Fortescue (age 39) and Emily Ormsby-Gore Countess Fortescue (age 33). Coefficient of inbreeding 1.58%.

On 07 Aug 1908 Edward Curzon 6th Earl Howe was born to Francis Curzon 5th Earl Howe (age 24) and Mary Curzon Countess Howe (age 20). Coefficient of inbreeding 1.58%.

On 10 Jun 1885 Fitzroy Somerset 4th Baron Raglan was born to George Somerset 3rd Baron Raglan (age 27) and Ethel Jemima Ponsonby Baroness Raglan (age 28). Coefficient of inbreeding 1.58%.

In 1547 Charles Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 18) and Anna Habsburg Spain Duchess Bavaria (age 18). Coefficient of inbreeding 1.58%.

On 29 Sep 1548 William Wittelsbach V Duke Bavaria was born to Albert V Wittelsbach V Duke Bavaria (age 20) and Anna Habsburg Spain Duchess Bavaria (age 20). Coefficient of inbreeding 1.58%.

On 17 Dec 1554 Ernest Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 26) and Anna Habsburg Spain Duchess Bavaria (age 26). Coefficient of inbreeding 1.58%.

On 20 Jan 1550 Ferdinand Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 21) and Anna Habsburg Spain Duchess Bavaria (age 21). Coefficient of inbreeding 1.58%.

On 21 Mar 1551 Maria Anna Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 23) and Anna Habsburg Spain Duchess Bavaria (age 22). Coefficient of inbreeding 1.58%.

On 04 Jul 1552 Maximiliana Maria Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 24) and Anna Habsburg Spain Duchess Bavaria (age 23). Coefficient of inbreeding 1.58%.

On 26 Jul 1553 Friedrich Wittelsbach was born to Albert V Wittelsbach V Duke Bavaria (age 25) and Anna Habsburg Spain Duchess Bavaria (age 25). Coefficient of inbreeding 1.58%.

Lucy Say was born to Hugh Say and Lucia Clifford. She a great x 2 granddaughter of King John "Lackland" of England. Coefficient of inbreeding 1.58%.

On 21 Oct 1835 Alan Stewart 10th Earl Galloway was born to Randolph Stewart 9th Earl Galloway (age 35) and Harriet Blanche Somerset Countess Galloway (age 24). Coefficient of inbreeding 1.58%.

On 11 Mar 1827 Dudley Fitzgerald De Ros 23rd Baron Ros Helmsley was born to William Fitzgerald De Ros 22nd Baron Ros Helmsley (age 29) and Georgiana Lennox Baroness Ros Helmsley (age 31). Coefficient of inbreeding 1.58%.

On 14 Oct 1836 Randolph Stewart 11th Earl Galloway was born to Randolph Stewart 9th Earl Galloway (age 36) and Harriet Blanche Somerset Countess Galloway (age 25) at Galloway House. Coefficient of inbreeding 1.58%.

On 08 Nov 1838 Alexander Stewart was born to Randolph Stewart 9th Earl Galloway (age 38) and Harriet Blanche Somerset Countess Galloway (age 27). Coefficient of inbreeding 1.58%.

In 1842 Mary Louisa Stewart was born to Randolph Stewart 9th Earl Galloway (age 42) and Harriet Blanche Somerset Countess Galloway (age 30). Coefficient of inbreeding 1.58%.

On 06 Nov 1840 Emma Georgiana Stewart was born to Randolph Stewart 9th Earl Galloway (age 40) and Harriet Blanche Somerset Countess Galloway (age 29). Coefficient of inbreeding 1.58%.

On 08 Feb 1765 James Henry Leigh of Adlestrop was born to James Leigh (age 41) and Caroline Brydges (age 36). Coefficient of inbreeding 1.57%.

In 1832 Georgiana Frances Spencer was born to Frederick Spencer 4th Earl Spencer (age 33) and Elizabeth Georgiana Poyntz Countess Spencer (age 32). Coefficient of inbreeding 1.57%.

In 1835 John Poyntz Spencer 5th Earl Spencer was born to Frederick Spencer 4th Earl Spencer (age 36) and Elizabeth Georgiana Poyntz Countess Spencer (age 35). Coefficient of inbreeding 1.57%.

In 1838 Sarah Isabella Spencer was born to Frederick Spencer 4th Earl Spencer (age 39) and Elizabeth Georgiana Poyntz Countess Spencer (age 38). Coefficient of inbreeding 1.57%.

On 14 Nov 1887 Harriet Hepburn-Stuart-Forbes-Trefusis was born to Charles Hepburn-Stuart-Forbes-Trefusis 21st Baron Clinton (age 24) and Jane Grey McDonnell Baroness Clinton (age 24). Coefficient of inbreeding 1.57%.

On 19 Aug 1889 Fenella Hepburn-Stuart-Forbes-Trefusis was born to Charles Hepburn-Stuart-Forbes-Trefusis 21st Baron Clinton (age 26) and Jane Grey McDonnell Baroness Clinton (age 26). Coefficient of inbreeding 1.57%.

Around 1463 James Tuchet 7th Baron Audley, 4th Baron Tuchet was born to John Tuchet 6th Baron Audley, 3rd Baron Tuchet (age 37) and Anne Echingham Baroness Audley Heighley (age 43). Coefficient of inbreeding 1.57%.

In 1455 Anne Tuchet was born to John Tuchet 6th Baron Audley, 3rd Baron Tuchet (age 29) and Anne Echingham Baroness Audley Heighley (age 35). Coefficient of inbreeding 1.57%.

On 19 Jul 1878 Leopold Clement Saxe Coburg Gotha was born to Ferdinand Philipp Saxe Coburg Gotha (age 34) and Louise Wettin (age 20). Coefficient of inbreeding 1.57%.

On 30 Apr 1881 Dorothea Maria Saxe Coburg Gotha Duchess Schleswig Holstein Sonderburg Augustenburg was born to Ferdinand Philipp Saxe Coburg Gotha (age 36) and Louise Wettin (age 23). Coefficient of inbreeding 1.57%.

Around 1470 Eleanor Tuchet was born to John Tuchet 6th Baron Audley, 3rd Baron Tuchet (age 44) and Anne Echingham Baroness Audley Heighley (age 50). Coefficient of inbreeding 1.57%.

On 17 Aug 1916 Antony Guy Acland 5th Baronet was born to Hubert Acland 4th Baronet (age 26) and Lalage Mary Kathleen Acland (age 27). Coefficient of inbreeding 1.57%.

Around 1449 Archibald Campbell 2nd Earl Argyll was born to Colin Campbell 1st Earl Argyll (age 16) and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Isabel Campbell was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Around 1468 Margaret Campbell Lady Seton was born to Colin Campbell 1st Earl Argyll (age 35) and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Catharine Campbell was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

In 1460 Helen Campbell Countess Eglinton was born to Colin Campbell 1st Earl Argyll (age 27) and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Elizabeth Campbell Lady Oliphant was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Mary Campbell was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Agnes Campbell was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Thomas Campbell was born to Colin Campbell 1st Earl Argyll and Isabella Stewart Countess Argyll. Coefficient of inbreeding 1.57%.

Elizabeth Maxwell Countess Winton was born to John Maxwell 6th Lord Herries of Terregles and Elizabeth Maxwell Lady Terregles. Coefficient of inbreeding 1.57%.

In 1605 John Maxwell 3rd Earl Nithsdale was born to John Maxwell 6th Lord Herries of Terregles (age 25) and Elizabeth Maxwell Lady Terregles (age 20). Coefficient of inbreeding 1.57%.

On 21 Sep 1893 Joan Katherine Lambton Baroness Joicey was born to Frederick Lambton 4th Earl Durham (age 38) and Beatrix Bulteel Countess Durham (age 34). Coefficient of inbreeding 1.57%.

On 07 Oct 1884 John Frederick Lambton 5th Earl Durham was born to Frederick Lambton 4th Earl Durham (age 29) and Beatrix Bulteel Countess Durham (age 25). Coefficient of inbreeding 1.57%.

On 03 Dec 1883 Claud Lambton was born to Frederick Lambton 4th Earl Durham (age 28) and Beatrix Bulteel Countess Durham (age 24). Coefficient of inbreeding 1.57%.

On 03 Jul 1880 Violet Lambton Countess Ellesmere was born to Frederick Lambton 4th Earl Durham (age 25) and Beatrix Bulteel Countess Durham (age 21). Coefficient of inbreeding 1.57%.

On 13 Sep 1887 Geoffrey Lambton was born to Frederick Lambton 4th Earl Durham (age 32) and Beatrix Bulteel Countess Durham (age 28). Coefficient of inbreeding 1.57%.

On 08 Dec 1881 Lilian Lambton Countess of Home was born to Frederick Lambton 4th Earl Durham (age 26) and Beatrix Bulteel Countess Durham (age 22). Coefficient of inbreeding 1.57%.

Janet Stewart was born to John Stewart of Minto and Margaret Stewart of Cardonald. Coefficient of inbreeding 1.57%.

Mabel Cynthia Duncombe Lady Graham was born to William Duncombe 1st Earl Feversham and Mabel Violet Graham Countess Feversham. Coefficient of inbreeding 1.57%.

On 30 Mar 1864 Hermione Wilhelmina Duncombe Duchess Leinster was born to William Duncombe 1st Earl Feversham (age 35) and Mabel Violet Graham Countess Feversham (age 31). Coefficient of inbreeding 1.57%.

On 14 Feb 1862 Hubert Ernest Valentine Duncombe was born to William Duncombe 1st Earl Feversham (age 33) and Mabel Violet Graham Countess Feversham (age 28). Coefficient of inbreeding 1.57%.

Henry L'Estrange 6th Baronet was born to Thomas L'Estrange 5th Baronet and Dorothy Spring Lady Strange. Coefficient of inbreeding 1.57%.

Ulrica Duncombe was born to William Duncombe 1st Earl Feversham and Mabel Violet Graham Countess Feversham. Coefficient of inbreeding 1.57%.

In 1866 Helen Venetia Duncombe Viscountess D'Abernon was born to William Duncombe 1st Earl Feversham (age 36) and Mabel Violet Graham Countess Feversham (age 32) at 20 Grosvenor Square, Belgravia. Coefficient of inbreeding 1.57%.

On 01 Aug 1852 William Reginald Duncombe was born to William Duncombe 1st Earl Feversham (age 23) and Mabel Violet Graham Countess Feversham (age 19). Coefficient of inbreeding 1.57%.

On 20 Oct 1853 James Henry Duncombe was born to William Duncombe 1st Earl Feversham (age 24) and Mabel Violet Graham Countess Feversham (age 20). Coefficient of inbreeding 1.57%.

On 28 Nov 1797 Charles Thomas Clifford was born to Charles Clifford Clifford 6th Baron Clifford Chudleigh (age 38) and Eleanor Mary Arundell Baroness Clifford Chudleigh (age 31). He a great x 3 grandson of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.56%.

On 29 May 1790 Charles Clifford 7th Baron Clifford Chudleigh was born to Charles Clifford Clifford 6th Baron Clifford Chudleigh (age 31) and Eleanor Mary Arundell Baroness Clifford Chudleigh (age 24). He a great x 3 grandson of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.56%.

On 22 Sep 1799 Mary Lucy Clifford Baroness Stourton was born to Charles Clifford Clifford 6th Baron Clifford Chudleigh (age 40) and Eleanor Mary Arundell Baroness Clifford Chudleigh (age 33). She a great x 3 granddaughter of King Charles II of England Scotland and Ireland. Coefficient of inbreeding 1.56%.

Violet Katherine Campbell was born to Walter Frederick Campbell and Katherine Isabella Cole. Coefficient of inbreeding 1.56%.

On 24 Jul 1847 Sophia Castila Rosamund Campbell Countess Granville was born to Walter Frederick Campbell (age 49) and Katherine Isabella Cole. Coefficient of inbreeding 1.56%.

Around 15 Jan 1707 Frances Coningsby was born to Thomas Coningsby 1st Earl Coningsby (age 50) and Frances Jones Countess Coningsbury (age 34). Coefficient of inbreeding 1.56%.

Around 1709 Margaret Coningsby 2nd Countess Coningsby was born to Thomas Coningsby 1st Earl Coningsby (age 52) and Frances Jones Countess Coningsbury (age 36). Coefficient of inbreeding 1.56%.

On 21 Jan 1630 John Bourchier was born to Edward Bourchier 4th Earl Bath (age 39) and Dorothy St John Countess Bath. Coefficient of inbreeding 1.56%.

In 1626 Elizabeth Bourchier Countess Denbigh was born to Edward Bourchier 4th Earl Bath (age 35) and Dorothy St John Countess Bath. Coefficient of inbreeding 1.56%.

In 1631 Anne Bourchier Countess Middlesex was born to Edward Bourchier 4th Earl Bath (age 40) and Dorothy St John Countess Bath. Coefficient of inbreeding 1.56%.

In 1627 Dorothy Bourchier was born to Edward Bourchier 4th Earl Bath (age 36) and Dorothy St John Countess Bath. Coefficient of inbreeding 1.56%.

On 28 Sep 1804 Charles Fitzroy 3rd Baron Southampton was born to George Fitzroy 2nd Baron Southampton (age 43) and Frances Isabella Seymour Baroness Southampton. Coefficient of inbreeding 1.56%.

On 26 Dec 1729 Edward Astley 4th Baronet was born to Jacob Astley 3rd Baronet (age 37) and Lucy L'Estrange (age 30). Coefficient of inbreeding 1.56%.

Blanche Astley was born to Jacob Astley 3rd Baronet and Lucy L'Estrange. Coefficient of inbreeding 1.56%.

On 11 Jun 1843 Albert Parker 3rd Earl Morley was born to Edmund Parker 2nd Earl Morley (age 33) and Harriet Sophia Parker Countess Morley (age 34). Coefficient of inbreeding 1.56%.

In 1724 Isabella Astley was born to Jacob Astley 3rd Baronet (age 31) and Lucy L'Estrange (age 25). Coefficient of inbreeding 1.56%.

On 02 May 1807 Henry Fitzroy was born to George Fitzroy 2nd Baron Southampton (age 45) and Frances Isabella Seymour Baroness Southampton. Coefficient of inbreeding 1.56%.

Anne Caroline Fitzroy was born to George Fitzroy 2nd Baron Southampton and Frances Isabella Seymour Baroness Southampton. Coefficient of inbreeding 1.56%.

In 1698 Thomas Fermor 1st Earl Pomfret was born to William Fermor 1st Baron Leominster (age 49) and Sophia Osborne Baroness Leominster (age 37). Coefficient of inbreeding 1.56%.

On 19 Dec 1886 Nelson Edward Oliver Rycroft 6th Baronet was born to Richard Nelson Rycroft 5th Baronet (age 27) and Dorothea Hester Bluett Wallop Lady Rycroft. Coefficient of inbreeding 1.56%.

Around 13 Feb 1748 John Wilmot Prideaux 7th Baronet was born to John Prideaux (age 30) and Elizabeth Rolt (age 45). Coefficient of inbreeding 1.56%.