In 1130 Reginald Ivrea III Count Burgundy (age 37) and Agatha Metz Countess Burgundy were married. She by marriage Countess Burgundy. She the daughter of Simon Metz I Duke Lorraine (age 54) and Adelaide Reginar Duchess Lorraine. He the son of Stephen Ivrea I Count Burgundy and Beatrice Metz Countess Burgundy. They were first cousin once removed.

In 1197 Alfonso IX King Leon (age 25) and Berengaria Ivrea I Queen Castile (age 18) were married. She by marriage Queen Consort Leon. She the daughter of Alfonso VIII King Castile (age 41) and Eleanor Plantagenet Queen Consort Castile (age 35). He the son of Ferdinand II King Leon and Urraca Burgundy Queen Consort Leon (age 49). They were first cousin once removed. She a granddaughter of King Henry "Curtmantle" II of England.

In or before 1230 Alan V Viscount Rohan (age 25) and Aliénor de Porhoët Viscountess Rohan (age 29) were married. She by marriage Viscountess Rohan. They were first cousin once removed. He a great x 3 grandson of King Henry I "Beauclerc" England. She a great x 2 granddaughter of King Henry I "Beauclerc" England.

Around Mar 1275 the marriage of Llewellyn "Last" Aberffraw (age 42) and Eleanor Montfort Princess of Wales (age 23) by proxy married.

On 13 Oct 1278 Llewellyn "Last" Aberffraw (age 45) and Eleanor Montfort Princess of Wales (age 26) were married at Worcester Cathedral [Map]. She the daughter of Simon de Montfort 6th Earl of Leicester 1st Earl Chester and Eleanor Plantagenet Countess Pembroke and Leicester. They were first cousin once removed. He a great grandson of King John "Lackland" of England. She a granddaughter of King John "Lackland" of England.

In 1287 Afonso Burgundy (age 23) and Violante Manuel (age 22) were married. He the son of Alfonso III King Portugal and Beatrice Queen Consort Portugal (age 45). They were first cousin once removed. He a great x 2 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

On 01 Dec 1291 James "The Just" II King Aragon (age 24) and Isabella Ivrea Queen Consort Aragon (age 8) were married. She by marriage Queen Consort Aragon. She the daughter of Sancho IV King Castile IV King Leon (age 33) and Maria Molina Queen Consort Castile Queen Consort Leon. He the son of Peter III King Aragon and Constance Hohenstaufen Queen Consort Aragon (age 42). They were first cousin once removed. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

Before 1297 Roger de Montalt 1st Baron Montalt and Joan Mowbray (age 53) were married. They were first cousin once removed. He a great x 4 grandson of King Henry I "Beauclerc" England. She a great x 2 granddaughter of King Henry "Curtmantle" II of England.

On 27 Mar 1304 Ralph Basset 2nd Baron Basset Drayton (age 26) and Joan Grey Baroness Basset Drayton (age 21) were married. She by marriage Baroness Basset Drayton. They were first cousin once removed.

On 21 Sep 1305 Louis X King France I Navarre (age 15) and Margaret of Burgundy Queen Consort France (age 15) were married. She the daughter of Robert II Duke Burgundy (age 57) and Agnes Capet Duchess Burgundy (age 45). He the son of Philip "The Fair" IV King France (age 37) and Joan Blois I Queen Navarre. They were first cousin once removed. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

In or before 1340 John Lovell 3rd Baron Lovel (age 25) and Isabel Zouche (age 19) were married. They were first cousin once removed. He a great x 5 grandson of King John "Lackland" of England.

On 08 Jan 1345 Philip Duke Valois (age 8) and Blanche Évreux Queen Consort France (age 14) were married. She the daughter of Philip "Noble" III King Navarre and Joan Capet II Queen Navarre (age 32). He the son of King Philip "Fortunate" VI of France (age 51) and Joan "Lame" Burgundy Queen Consort France (age 51). They were first cousin once removed. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry III of England.

Before 1377 Thomas Mar 10th Earl Mar (age 47) and Margaret Stewart 3rd Countess Angus and Mar were married. She by marriage Countess Mar. She the daughter of Thomas Stewart 2nd Earl Angus. He the son of Domhnall Mar II Earl Mar (age 83) and Isabella Stewart. They were first cousin once removed.

In 1390 John Stewart 2nd Earl Buchan (age 9) and Elizabeth Douglas Countess Buchan and Orkney and Caithness were married. She the daughter of Archibald Douglas 1st Duke Touraine (age 18) and Margaret Stewart Duchess Touraine. He the son of Robert Stewart 1st Duke Albany (age 50) and Muriella Keith Duchess Albany (age 32). They were first cousin once removed. He a great x 5 grandson of King John "Lackland" of England.

In 1400 King Louis of Naples (age 22) and Yolanda Barcelona Queen Consort Naples were married at Arles. She by marriage Queen Consort Naples. She the daughter of King John I of Aragon and Yolande of Bar Queen Consort Aragon (age 35). He the son of Louis Valois Anjou I Duke Anjou and Marie Chatillon Duchess Anjou (age 55). They were first cousin once removed. He a great x 4 grandson of King Henry III of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

In Nov 1411 Thomas Lancaster 1st Duke of Clarence (age 23) and Margaret Holland Duchess Clarence (age 26) were married. She the daughter of Thomas Holland 2nd Earl Kent and Alice Fitzalan Countess Kent (age 61). He the son of King Henry IV of England (age 44) and Mary Bohun. They were first cousin once removed. She a great x 2 granddaughter of King Edward "Longshanks" I of England.

On 20 Jun 1413 Philip Valois II Count Nevers (age 23) and Bonne Artois Duchess Burgundy (age 17) were married at Beaumont en Artois. She by marriage Countess Nevers. She the daughter of Philip Artois Count Eu and Marie Valois I Duchess Auverge (age 38). He the son of Philip "Bold" Valois II Duke Burgundy and Margaret Dampierre Duchess Burgundy. They were first cousin once removed. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King Henry III of England.

In 1414 William Seton Master of Seton (age 24) and Janet Dunbar (age 24) were married. She the daughter of George Dunbar 10th Earl March (age 76) and Christina Wyntoun Countess Dunbar. They were first cousin once removed.

Before 29 May 1421 John II King Aragon (age 22) and Blanche Évreux Queen Consort Aragon (age 33) were married. She by marriage Queen Consort Aragon. She the daughter of Charles III King Navarre (age 60) and Eleanor of Castile Queen Consort Navarre (age 58). He the son of Ferdinand I King Aragon and Eleanor of Alberquerque Queen Consort Aragon (age 47). They were first cousin once removed. She a great x 5 granddaughter of King Henry III of England.

In 1428 Louis Bourbon (age 23) and Jeanne Auvergne were married. He the son of John Bourbon I Duke Bourbon (age 47) and Marie Valois I Duchess Auverge (age 53). They were first cousin once removed. He a great x 5 grandson of King Henry III of England.

On 22 Sep 1428 Edward "The Philosopher" I King Portugal (age 36) and Eleanor Trastámara Queen Consort Portugal were married. She by marriage Queen Consort Portugal. She the daughter of Ferdinand I King Aragon and Eleanor of Alberquerque Queen Consort Aragon (age 54). He the son of King John I of Portugal (age 76) and Philippa Lancaster Queen Consort Portugal. They were first cousin once removed. He a great grandson of King Edward III of England.

Before 22 Feb 1452 William Douglas 8th Earl Douglas 2nd Earl Avondale (age 27) and Margaret "Fair Lady of Galloway" Douglas Countess (age 17) were married. She would later marry his younger brother James Douglas 9th Earl Douglas 3rd Earl Avondale (age 26); an example of Married to Two Siblings. She the daughter of Archibald Douglas 2nd Duke Touraine and Euphemia Graham Lady Hamilton (age 44). He the son of James "Gross" Douglas 7th Earl Douglas 1st Earl Avondale and Beatrix Sinclair Countess Douglas and Avondale (age 54). They were first cousin once removed.

Before 1455 James Douglas 9th Earl Douglas 3rd Earl Avondale (age 29) and Margaret "Fair Lady of Galloway" Douglas Countess (age 19) were married. She by marriage Countess Douglas, Countess Avondale. She had previously married his brother William Douglas 8th Earl Douglas 2nd Earl Avondale; an example of Married to Two Siblings. She the daughter of Archibald Douglas 2nd Duke Touraine and Euphemia Graham Lady Hamilton (age 46). He the son of James "Gross" Douglas 7th Earl Douglas 1st Earl Avondale and Beatrix Sinclair Countess Douglas and Avondale (age 56). They were first cousin once removed.

In Dec 1458 John IV Marquis of Montferrat (age 45) and Margaret Savoy Countess Saint Pol (age 19) were married. She by marriage Marchioness Montferrat. The difference in their ages was 25 years. She the daughter of Louis Savoy I Count Savoy (age 45) and Anne Cyprus Countess Savoy (age 40). They were first cousin once removed. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

On 15 May 1459 James Douglas 1st Earl Morton and Joan Stewart Countess Morton (age 31) were married. She by marriage Countess Morton. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. They were first cousin once removed. She a great x 2 granddaughter of King Edward III of England.

In 1463 Adolf Egmont 2nd Duke Guelders (age 24) and Catherine Bourbon Duchess Guelders (age 23) were married. She by marriage Duchess Guelders. She the daughter of Charles Bourbon I Duke Bourbon and Agnes Valois Duchess Bourbon (age 58). He the son of Arnold Egmont 1st Duke Guelders (age 52) and Catherine La Marck (age 45). They were first cousin once removed. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

Before 29 Jun 1463 Francis Montfort II Duke Brittany (age 30) and Margaret Montfort Duchess Brittany (age 20) were married. She by marriage Duchess Brittany 1364 War of Montfort. She the daughter of Francis Montfort I Duke Brittany and Isabella Stewart Duchess Brittany (age 37). They were first cousin once removed. He a great x 4 grandson of King Henry III of England. She a great x 3 granddaughter of King Edward III of England.

In 1472 Fernando II Duke of Braganza (age 42) and Isabella Aviz (age 13) were married. The difference in their ages was 29 years. They were first cousin once removed. She a great x 3 granddaughter of King Edward III of England.

In 1474 Charles Valois Anjou IV Duke Anjou (age 28) and Joan Lorraine Duchess Anjou (age 16) were married. She the daughter of Frederick Lorraine Count Vaudémont and Yolande Valois Anjou (age 45). He the son of Charles Valois Anjou Count Maine and Isabelle Luxemburg Countess Maine. They were first cousin once removed.

On 19 Aug 1479 Jean V Count Armagnac and Jeanne Foix were married. The difference in their ages was 34 years. She the daughter of Gaston IV Count Foix and Eleanor Trastámara Queen Consort Navarre. He the son of John IV Count Armagnac and Isabella Évreux Countess Armagnac. They were first cousin once removed.

In 1497 Manuel "Fortunate" I King Portugal (age 27) and Isabella Trastámara Queen Consort Portugal (age 27) were married. She by marriage Queen Consort Portugal. He would, three years later, marry her younger sister Maria Trastámara Queen Consort Portugal (age 15); an example of Married to Two Siblings. She the daughter of Ferdinand II King Aragon (age 44) and Isabella Queen Castile (age 45). They were first cousin once removed. He a great x 3 grandson of King Edward III of England. She a great x 3 granddaughter of King Edward III of England.

In 1499 Louis XII King France (age 36) and Anne of Brittany Queen Consort France (age 21) were married. She by marriage Queen Consort of France. He the son of Charles Valois Duke Orléans and Mary La Marck Duchess Orléans. They were first cousin once removed. She a great x 5 granddaughter of King Henry III of England.

In 1500 Manuel "Fortunate" I King Portugal (age 30) and Maria Trastámara Queen Consort Portugal (age 18) were married. She by marriage Queen Consort Portugal. She the younger sister of his first wife Isabella Trastámara Queen Consort Portugal; an example of Married to Two Siblings. She the daughter of Ferdinand II King Aragon (age 47) and Isabella Queen Castile (age 48). They were first cousin once removed. He a great x 3 grandson of King Edward III of England. She a great x 3 granddaughter of King Edward III of England.

In 1500 Philibert "Handsome Good" Savoy 2nd Duke Savoy (age 19) and Margaret Habsburg Princess Asturias (age 20) were married. She by marriage Duchess Savoy. She the daughter of Maximilian Habsburg I Holy Roman Emperor (age 40) and Mary Valois Duchess Burgundy. He the son of Philip "Landless" Savoy II Duke Savoy and Margaret Bourbon. They were first cousin once removed. She a great x 4 granddaughter of King Edward III of England.

In or before 1517 John Barry 13th Baron Barry (age 37) and Ellen Fitzgibbon (age 26) were married. They were first cousin once removed.

In 1526 Albert "The Elder" Hohenzollern I Duke Prussia (age 35) and Dorothea Oldenburg (age 21) were married. She the daughter of King Frederick I of Denmark (age 54) and Anna of Brandenburg. He the son of Frederick Hohenzollern I Margrave Brandenburg Ansbach (age 65). They were first cousin once removed.

In 1534 Patrick Hepburn 3rd Earl Bothwell (age 22) and Agnes Sinclair Countess Bothwell were married. She by marriage Countess Bothwell. He the son of Adam Hepburn 2nd Earl Bothwell and Agnes Stewart Countess Bothwell (age 65). They were first cousin once removed. He a great x 4 grandson of King Edward III of England.

After 07 Feb 1546 Anthony Heveningham (age 45) and Mary Shelton (age 36) were married. They were first cousin once removed.

On 11 May 1569 Nicholas of Lorraine Duke of Mercœur (age 44) and Catherine Romula Duchess of Lorraine (age 18) were married. The difference in their ages was 26 years. He the son of Antoine Lorraine II Duke Lorraine. They were first cousin once removed.

Before Feb 1583 John Stewart of Minto (age 58) and Margaret Stewart of Cardonald were married. They were first cousin once removed.

In 1584 Charles Emmanuel Savoy I Duke Savoy (age 21) and Catherine Habsburg Spain Duchess Savoy (age 16) were married. She by marriage Duchess Savoy. She the daughter of Philip "The Prudent" II King Spain (age 56) and Elizabeth Valois Queen Consort Spain. He the son of Emmanuel Philibert Duke of Savoy and Margaret Valois Duchess Berry and Savoy. They were first cousin once removed.

On 13 Jan 1585 John Fleming 1st Earl Wigtown (age 18) and Lilias Graham Countess Graham were married. She the daughter of John Graham 3rd Earl Montrose (age 37). They were first cousin once removed.

On 18 Apr 1599 Philip III King Spain (age 21) and Margaret of Austria Queen Consort Spain (age 14) were married. She by marriage Queen Consort Spain. He the son of Philip "The Prudent" II King Spain and Anna of Austria Queen Consort Spain. They were first cousin once removed.

Around 1600 Gerald Fitzgerald 14th Earl of Kildare and Elizabeth Nugent Countess Kildare were married. They were first cousin once removed.

In 1606 Robert Dudley (age 31) and Elizabeth Southwell (age 22) were married at Lyon, France [Map]. Bigamous in his case since his second wife Alice Leigh 1st Duchess Dudley (age 28) was alive. She the daughter of Robert Southwell and Elizabeth Howard Countess Carrick (age 41). He the illegitmate son of Robert Dudley 1st Earl of Leicester and Douglas Howard Baroness Sheffield (age 64). They were first cousin once removed.

On 17 Feb 1610 James Ogilvy 1st Earl Findlater (age 15) and Elizabeth Leslie were married. She the daughter of Andrew Leslie 5th Earl Rothes (age 69). They were first cousin once removed.

In 1626 Archibald Campbell 1st Marquess Argyll (age 18) and Margaret Douglas Marchioness Argyll (age 16) were married. She the daughter of William Douglas 7th Earl Morton (age 44) and Anne Keith Countess Morton. He the son of Archibald Campbell 7th Earl Argyll (age 51) and Agnes Douglas Countess Argyll. They were first cousin once removed.

In 1629 Ferdinando Gorges (age 64) and Elizabeth Gorges (age 51) were married at Wraxall, Somerset [Map]. She the daughter of Thomas Gorges of Longford Castle and Helena Snakenbourg Marchioness Northampton (age 80). They were first cousin once removed.

On 24 Oct 1636 Ernest "The Pious" Saxe Gotha I Duke Saxe Gotha (age 34) and Elisabeth Sophie Saxe Altenburg Duchess Saxe Gotha (age 17) were married at Altenburg. She by marriage Duchess Saxe Gotha. She the daughter of Johann Philipp Wettin Duke Saxe Altenburg (age 39) and Elisabeth of Brunswick-Wolfenbüttel Duchess of Saxe-Altenburg (age 43). He the son of Johann Wettin II Duke Saxe Weimar and Dorothea Maria Anhalt. They were first cousin once removed.

Before 1646 Jonathan Trelawny 2nd Baronet (age 23) and Mary Seymour (age 26) were married. They were first cousin once removed.

In 1661 Robert Rich 5th Earl Warwick 2nd Earl Holland (age 42) and Anne Montagu Countess Warwick and Holland were married. She by marriage Countess Holland. She the daughter of Edward Montagu 2nd Earl Manchester (age 59) and Anne Rich Viscountess Mandeville. He the son of Henry Rich 1st Earl Holland and Isabel Cope Countess Holland. They were first cousin once removed.

On 06 Feb 1662 George Keith 8th Earl Marischal (age 48) and Mary Hay Countess Marischal were married. She the daughter of George Hay 2nd Earl Kinnoull and Anne Douglas Countess Kinnoul. He the son of William Keith 6th Earl Marischal and Mary Erskine. They were first cousin once removed.

On 23 Sep 1666 Louis Henry Count Palatine of Simmern-Kaiserslautern (age 25) and Maria Orange Nassau (age 24) were married. They had no issue. They were first cousin once removed.

Before 12 Jun 1668 James Murray 2nd Earl Tullibardine (age 50) and Anne Murray Countess Tullibardine were married. She by marriage Countess Tullibardine. She the daughter of John Murray 1st Earl Atholl and Jean Campbell Countess Atholl. He the son of Patrick Murray 1st Earl Tullibardine. They were first cousin once removed.

On 18 Jan 1670 James Drummond 1st Duke Perth (age 22) and Jean Douglas (age 27) were married. She the daughter of William Douglas 1st Marquess Douglas and Mary Gordon Marchioness Douglas (age 70). He the son of James Drummond 3rd Earl Perth (age 55) and Anne Gordon. They were first cousin once removed.

On 16 May 1674 Thomas Lennard 1st Earl of Sussex (age 20) and Anne Fitzroy Countess Sussex (age 13) were married at Hampton Court Palace, Richmond [Map]. She the illegitmate daughter of King Charles II of England Scotland and Ireland (age 43) and Barbara Villiers 1st Duchess of Cleveland (age 33). They were first cousin once removed.

In Nov 1679 Charles "Bewitched" II King Spain (age 17) and Marie Louise Bourbon Queen Consort Spain (age 17) were married. She by marriage Queen Consort Spain. She the daughter of Philip Bourbon I Duke Orléans (age 39) and Princess Henrietta Stewart Duchess Orléans (age 35). He the son of Philip IV King Spain and Mariana of Austria Queen Consort Spain (age 44). They were first cousin once removed. She a granddaughter of King Charles I of England, Scotland and Ireland.

In 1691 William Hamilton (age 28) and Margaret Culpepper (age 25) were married. They were first cousin once removed.

In Apr 1691 William O'Brien 3rd Earl Inchiquin (age 29) and Mary Villiers Countess Inchiquin were married. He the son of William O'Brien 2nd Earl Inchiquin (age 51) and Margaret Boyle Countess Inchiquin. They were first cousin once removed.

Before 06 Mar 1704 William Ward (age 27) and Mary Grey were married. They were first cousin once removed.

On 23 Mar 1709 Warwick Lake (age 48) and Elizabeth Gerard (age 21) were married. The difference in their ages was 27 years. They were first cousin once removed.

In Jan 1712 John Jardine 3rd Baronet (age 29) and Catherine Lockhart Lady Jardine were married. She by marriage Lady Jardine of Applegirth in Dumfrieshire. They were first cousin once removed.

On 15 Oct 1712 Ferdinand Albert II Duke of Brunswick-Wolfenbüttel (age 32) and Princess Antoinette of Brunswick-Wolfenbüttel (age 16) were married. They were first cousin once removed.

On 02 Jan 1723 Francis Josias Saxe Coburg Saalfeld Duke Saxe Coburg Saalfeld (age 25) and Duchess Anna Sophie Of Saxe-Coburg-Saalfeld (age 22) were married. She by marriage Duchess Saxe Coburg Saalfeld. He the son of John Ernest Saxe Coburg Saalfeld IV Duke Saxe Coburg Saalfeld (age 64) and Charlotte Johanna Waldeck Wildungen Duchess Saxe Coburg Saalfeld. They were first cousin once removed.

In 1734 Friedrich Wilhelm Hohenzollern (age 33) and Sophia Dorothea Hohenzollern (age 14) were married. She the daughter of Frederick William "Soldier King" I King Prussia (age 45) and Sophia Dorothea Hanover Queen Consort Prussia (age 46). They were first cousin once removed. She a granddaughter of King George I of Great Britain and Ireland.

On 27 Nov 1734 Johann Adolph Wettin Duke Saxe Weissenfels (age 49) and Fredericka Saxe Coburg Altenburg (age 19) were married at Altenburg. The difference in their ages was 29 years. She the daughter of Frederick Saxe Coburg Altenburg II Duke Saxe Gotha Altenburg and Magdalena Augusta Anhalt Zerbst Anhaltzerbst Duchess Saxe Gotha Altenburg. They were first cousin once removed.

On 16 Jan 1735 Charles Dillon 10th Viscount Dillon and Frances Dillon Viscountess Dillon were married. They were first cousin once removed.

On 25 Oct 1739 Infante Philip of Spain (age 19) and Louise Elisabeth of France (age 12) were married. She the daughter of Louis XV King France (age 29) and Marie Leszczyńska Queen Consort France (age 36). He the son of Philippe V King Spain (age 55) and Elisabeth Farnese Queen Consort Spain (age 47). They were first cousin once removed. She a great x 3 granddaughter of King Charles I of England, Scotland and Ireland.

Before 23 Jun 1741 Thomas Chudleigh 5th Baronet and Henrietta Chudleigh Lady Chudleigh were married. They were first cousin once removed.

On 23 Feb 1745 Dauphin Louis Bourbon (age 15) and Infanta Maria Teresa Rafaela of Spain (age 18) were married at the Palace of Versailles. She the daughter of Philippe V King Spain (age 61) and Elisabeth Farnese Queen Consort Spain (age 52). He the son of Louis XV King France (age 35) and Marie Leszczyńska Queen Consort France (age 41). They were first cousin once removed. He a great x 3 grandson of King Charles I of England, Scotland and Ireland.

On 15 Apr 1759 John Evans 5th Baron Carbery (age 21) and Emilia Crowe Baroness Carbery were married. They were first cousin once removed.

On 04 Jun 1765 John Perceval 3rd Earl Egmont (age 27) and Isabella Powlett Countess Egmont were married. He the son of John Perceval 2nd Earl Egmont (age 54) and Catherine Cecil Countess Egmont. They were first cousin once removed. She a great x 2 granddaughter of King Charles II of England Scotland and Ireland.

On 21 Mar 1769 Duke Ernest of Saxe Coburg Altenburg (age 24) and Charlotte Saxe Meiningen Duchess Saxe Gotha Altenburg (age 17) were married at Meiningen. She by marriage Duchess Saxe Gotha Altenburg. He the son of Duke Frederick III of Saxe Coburg Altenburg III (age 69) and Luise Dorothea Saxe Meiningen Duchess Saxe Gotha Altenburg. They were first cousin once removed.

On 21 Aug 1777 Charles Townshend 1st Baron Bayning (age 47) and Annabella Smith-Powlett (age 23) were married at Lambeth Palace [Map]. The difference in their ages was 24 years. They were first cousin once removed.

On 03 Apr 1784 John Sheffield 2nd Baronet (age 41) and Charlotte Sophia Digby (age 17) were married. The difference in their ages was 24 years. They were first cousin once removed.

On 06 Jan 1785 Francis Henry Tyler (age 31) and Betty Maria Roper were married. They were first cousin once removed. He a great x 2 grandson of King Charles II of England Scotland and Ireland.

Before 03 Nov 1785 James Everard Arundell 9th Baron Arundel (age 22) and Mary Christina Arundell Baroness Arundel Wardour were married. She by marriage Baroness Arundel of Wardour in Wiltshire. They were first cousin once removed.

On 06 Jun 1791 James Buller (age 25) and Ann Buller (age 21) were married. She the daughter of Bishop William Buller (age 56) and Anne Thomas (age 53). They were first cousin once removed.

On 27 May 1800 Kenneth Alexander Howard 1st Earl of Effingham (age 32) and Charlotte Primrose Countess Effingham (age 24) were married. She by marriage Baroness Howard of Effingham. She the daughter of Neil Primrose 3rd Earl Rosebery (age 71) and Mary Vincent Countess Rosebery (age 48). They were first cousin once removed.

In 1805 Charles D'Oyly 7th Baronet (age 23) and Marian Greer (age 15) were married at Tumluk, Bengal. They were first cousin once removed.

On 16 Jul 1817 John Douglas 7th Marquess Queensberry (age 38) and Sarah Douglas Marchioness Queensbury were married. They were first cousin once removed.

On 28 May 1823 George Sutherland Leveson-Gower 2nd Duke Sutherland (age 36) and Harriet Elizabeth Georgiana Howard Duchess Sutherland (age 17) were married. She the daughter of George Howard 6th Earl Carlisle (age 49) and Georgiana Cavendish Countess Carlisle (age 39). He the son of George Granville Leveson-Gower 1st Duke Sutherland (age 65) and Elizabeth Sutherland Duchess Sutherland 19th Countess Sutherland (age 58). They were first cousin once removed.

On 14 Feb 1826 Augustus Brydges Henniker 3rd Baronet (age 31) and Elizabeth Henniker-Major Lady Henniker were married. She by marriage Lady Henniker of Newton Hall in Essex. They were first cousin once removed.

On 23 Nov 1826 Frederick William Thomas Vernon Wentworth (age 31) and Augusta Frederica Brudenell (age 31) were married. She the daughter of Charles Brudenell 1st Marquess Ailesbury (age 53) and Henrietta Maria Hill. They were first cousin once removed.

On 05 May 1829 George Lewen Glyn 4th Baronet (age 24) and Henrietta Amelia Glyn Lady Glyn were married. They were first cousin once removed.

On 03 Nov 1829 John Fane (age 25) and Ellen Catherine Parker were married. She the daughter of Thomas Parker 5th Earl Macclesfield (age 66) and Daughter of Lewis Edwards. They were first cousin once removed.

On 03 Aug 1842 Harry Chichester 2nd Baron Templemore (age 21) and Laura Caroline Jane Paget Baroness Templemore (age 21) were married. She by marriage Baroness Templemore of Templemore in Donegal. They were first cousin once removed.

On 08 Apr 1851 George Frederick Samuel Robinson 1st Marquess Ripon (age 23) and Henrietta Anne Theodosia Vyner Marchioness Ripon (age 17) were married. He the son of Frederick John Robinson 1st Earl Ripon (age 68) and Sarah Albinia Louisa Hobart (age 58). They were first cousin once removed.

Before 10 Sep 1854 Frederick Ulric Graham 3rd Baronet (age 34) and Jane Hermione Seymour Lady Graham (age 22) were married. She the daughter of Edward Adolphus Seymour 12th Duke Somerset (age 49) and Jane Georgiana Sheridan Duchess Somerset (age 44). They were first cousin once removed.

On 18 Aug 1857 Frederick Twisleton-Wykeham-Fiennes 10th or 16th Baron Saye and Sele (age 58) and Caroline Eliza Leigh Baroness Saye and Sele (age 32) were married. She by marriage Baroness Saye and Sele. The difference in their ages was 25 years. They were first cousin once removed.

In or before 1859 Frederick Dampier Rich (age 40) and Jacinthia Catherine Hesketh Lethbridge (age 38) were married. They were first cousin once removed.

On 06 Oct 1859 Charles Henry Maude (age 29) and Georgina Henrietta Emma Hanbury-Tracy (age 27) were married. They were first cousin once removed.

Before 1860 General William Francis Napier (age 74) and Caroline Amelia Fox were married. They were first cousin once removed. He a great x 2 grandson of King Charles II of England Scotland and Ireland. She a great x 3 granddaughter of King Charles II of England Scotland and Ireland.

On 06 Feb 1861 General George Augustus Frederick Paget (age 42) and Louisa Elizabeth Heneage Countess Essex were married. He the son of Henry William Paget 1st Marquess Anglesey and Charlotte Cadogan Marchioness Anglesey. They were first cousin once removed. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.

On 03 Jun 1863 Arthur Algernon Capell 6th Earl Essex (age 60) and Louisa Elizabeth Heneage Countess Essex were married. She by marriage Countess Essex. They were first cousin once removed. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.

On 24 Jun 1879 George Thomas Shuckburgh 9th Baronet (age 49) and Ida Florence Geraldine Robertson Lady Schuckburgh were married. She by marriage Lady Schuckburgh of Schuckburgh in Warwickshire. They were first cousin once removed.

Before 17 Jun 1881 Robert Spencer (age 64) and Louisa Spencer-Churchill (age 61) were married. She the daughter of George Spencer-Churchill 6th Duke Marlborough and Jane Stewart Duchess Marlborough. They were first cousin once removed. He a great x 4 grandson of King Charles II of England Scotland and Ireland.

On 20 Nov 1883 Reverend Gilbert Vyvyan Heathcote (age 53) and Mary Henrietta Perceval were married. They were first cousin once removed.

In 1889 Paul Holstein Gottorp Romanov (age 28) and Alexandra Glücksburg (age 19) were married. She the daughter of George I King Greece (age 43) and Olga Constantinovna Holstein Gottorp Romanov Queen Consort Greece (age 37). They were first cousin once removed. He a great x 5 grandson of King George I of Great Britain and Ireland. She a great x 4 granddaughter of King George II of Great Britain and Ireland.

In 1890 George Florance Irby 6th Baron Boston (age 29) and Cecilia Constance Irby (age 19) were married. There was no issue from the marriage. They were first cousin once removed.

On 28 Aug 1894 Major Basil St John Mundy (age 32) and Violet Wilhelmina Morgan (age 33) were married. They were first cousin once removed.

On 12 Feb 1896 William Gervase Beckett 1st Baronet (age 30) and Mabel Theresa Duncombe (age 19) were married. They were first cousin once removed.

In 1897 Gerard Cecil Noel of Cottesmore (age 33) and Madeline Edith Clifton (age 29) were married. They were first cousin once removed.

On 27 Apr 1899 Captain William Stirling-Home-Drummond-Moray (age 47) and Gwendoline Edwardes (age 29) were married. They were first cousin once removed.

On 05 Feb 1904 Henry Fitzalan Howard 15th Duke of Norfolk (age 56) and Gwendolen Constable-Maxwell Duchess Norfolk (age 27) were married. She by marriage Duchess Norfolk. The difference in their ages was 29 years. He the son of Henry Granville Fitzalan 14th Duke of Norfolk and Augusta Mary Minna Catherine Lyons Duchess Norfolk. They were first cousin once removed.

On 15 Oct 1913 Prince Arthur of Connaught (age 30) and Princess Alexandra Duff Duchess Fife (age 22) were married at Chapel Royal, St James's Palace. She the daughter of Alexander Duff 1st Duke Fife and Louise Windsor Duchess Fife (age 46). He the son of Prince Arthur Windsor 1st Duke Connaught and Strathearn (age 63) and Luise Margarete Hohenzollern Duchess Connaught (age 53). They were first cousin once removed. He a grandson of Queen Victoria of the United Kingdom. She a granddaughter of King Edward VII of the United Kingdom.

In 1927 Arthur Harold Clayton 11th Baronet (age 23) and Muriel Edith Lily Clayton (age 26) were married. They were first cousin once removed.

On 04 Aug 1927 Richard George Penn Curzon 4th Earl Howe (age 66) and Lorna Catherine Curzon Countess Howe were married. She by marriage Countess Howe. He the son of Richard William Penn Curzon Howe 3rd Earl Howe and Isabella Maria Katherine Anson Countess Howe. They were first cousin once removed.

In 1931 Georg Donatus Hesse Darmstadt Grand Duke (age 24) and Cecilie Glücksburg Grand Duchess (age 19) were married. She by marriage Grand Duchess of Hesse and by Rhine. He the son of Ernest Louis Hesse Darmstadt Grand Duke (age 62) and Eleonore Solms Hohensolms Lich Grand Duchess. They were first cousin once removed. He a great grandson of Queen Victoria of the United Kingdom. She a great x 2 granddaughter of Queen Victoria of the United Kingdom.

On 03 Oct 1933 John Digby Pepys 7th Earl of Cottenham (age 26) and Angela Neville Countess Cottenham (age 23) were married. She the daughter of Guy Larnach Neville 4th Marquess Abergavenny (age 50) and Isabel "Nellie" Larnach Marchioness Abergavenny (age 43). He the son of Kenelm Charles Pepys 4th Earl of Cottenham and Rose Neville Countess Cottentham. They were first cousin once removed.

In 1938 Paul I King Greece (age 36) and Frederica Hanover Queen Consort Greece (age 20) were married. She by marriage Queen Consort Greece. She the daughter of Ernest Augustus Hanover Duke Brunswick (age 50) and Viktoria Luise Hohenzollern Duchess Brunswick (age 45). He the son of Constantine I King Greece and Sophia Hohenzollern Queen Consort Greece. They were first cousin once removed. He a great grandson of Queen Victoria of the United Kingdom. She a great x 2 granddaughter of Queen Victoria of the United Kingdom.

François Louis "Le Grand Conti" Bourbon Condé Conti Prince Conti and Marie Thérèse Bourbon Condé were married. She the daughter of Henri Jules Bourbon Condé Prince Condé and Anne Henriette Palatinate Simmern. They were first cousin once removed. She a great x 2 granddaughter of King James I of England and Ireland and VI of Scotland.

Betram Verdun and Maud Ferrers were married. She the daughter of Robert Ferrers 2nd Earl of Derby and Margaret Peverell Countess Derby. They were first cousin once removed.

Ferdinand I King Aragon and Eleanor of Alberquerque Queen Consort Aragon were married. She by marriage Queen Consort Aragon. He the son of John I King Castile and Eleanor Barcelona Queen Consort Castile. They were first cousin once removed.

Amadeus Savoy VIII Count Savoy and Mary Valois Countess Savoy were married. She the daughter of Philip "Bold" Valois II Duke Burgundy and Margaret Dampierre Duchess Burgundy. He the son of Amadeus "Red Count" Savoy VII Count Savoy and Bonne Valois Countess Armagnac and Savoy. They were first cousin once removed. She a great x 3 granddaughter of King Edward "Longshanks" I of England.

Francis Browne 4th Viscount Montagu and Mary Herbert Viscountess Montague were married. She the daughter of William Herbert 1st Marquess Powis and Elizabeth Somerset Marchioness Powis. They were first cousin once removed.

Francis Trelawny and Margaret Seymour were married. His brother Jonathan Trelawny 2nd Baronet had married, or would subsequenly marry, her sister Jonathan Trelawny 2nd Baronet. They were first cousin once removed.

Hamon Strange and Elizabeth Hastings were married. They were first cousin once removed.

King Philip "Fortunate" VI of France and Joan "Lame" Burgundy Queen Consort France were married. She by marriage Queen Consort of France. She the daughter of Robert II Duke Burgundy and Agnes Capet Duchess Burgundy. He the son of Charles Valois I Count Valois and Margaret Capet Countess Valois. They were first cousin once removed. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

Alfonso IV King Aragon and Eleanor Ivrea Queen Consort Aragon were married. She by marriage Queen Consort Aragon. She the daughter of Ferdinand IV King Castile IV King Leon and Constance Burgundy Queen Consort Castile Queen Consort Leon. He the son of James "The Just" II King Aragon and Blanche Capet Queen Consort Aragon. They were first cousin once removed. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

George Villiers 4th Viscount Grandison and Mary Leigh Viscountess Grandison were married. She the daughter of Francis Leigh 1st Earl Chichester and Audrey Boteler Countess Chichester. They were first cousin once removed.

Robert Stafford and Gundreda Stafford were married. They were first cousin once removed.

Cadfan Aberffraw and Gwenllian Unknown were married. They were first cousin once removed.

Richard Whitmore of Lower Slaughter and Anne Weld were married. They were first cousin once removed.