Mary Talbot Countess Northumberland was born to George Talbot 4th Earl of Shrewsbury and Anne Hastings Countess Shrewsbury and Waterford 1471-1520. Coefficient of inbreeding 2.14%. 
On 28 Jun 1473 [her grandfather] John Talbot 3rd Earl of Shrewsbury (age 24) died at Coventry [Map]. He was buried at Lady Chapel, Worksop Priory. His son [her father] George Talbot 4th Earl of Shrewsbury (age 5) succeeded 4th Earl of Shrewsbury, 4th Earl Waterford, 9th Baron Furnivall, 13th Baron Strange Blackmere, 10th Baron Talbot.
On 27 Jun 1481 [her father] George Talbot 4th Earl of Shrewsbury (age 13) and [her mother] Anne Hastings Countess Shrewsbury and Waterford 1471-1520 (age 10) were married. She by marriage Countess of Shrewsbury, Countess Waterford. He the son of John Talbot 3rd Earl of Shrewsbury and Catherine Stafford Countess Shrewsbury and Waterford 1437-1476. They were second cousins. 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 or before 1513 Henry Clifford 1st Earl of Cumberland (age 20) and [her future sister-in-law] Margaret Percy Baroness Clifford (age 12) were married. She by marriage Baroness de Clifford. She the daughter of Henry Percy 5th Earl of Northumberland (age 34) and (age 35). They were fourth cousins. He a great x 5 grandson of King Edward "Longshanks" I of England. She a great x 4 granddaughter of King Edward III of England. 
In 1520 [her mother] Anne Hastings Countess Shrewsbury and Waterford 1471-1520 (age 49) died.
After 1520 [her father] George Talbot 4th Earl of Shrewsbury (age 52) and Elizabeth Walden (age 29) were married. The difference in their ages was 23 years. He the son of John Talbot 3rd Earl of Shrewsbury and Catherine Stafford Countess Shrewsbury and Waterford 1437-1476. He a great x 3 grandson of King Edward III of England.
In Jan 1524 Henry Percy 6th Earl of Northumberland (age 22) and Mary Talbot Countess Northumberland were married. She the daughter of George Talbot 4th Earl of Shrewsbury (age 56) and Anne Hastings Countess Shrewsbury and Waterford 1471-1520. He the son of Henry Percy 5th Earl of Northumberland (age 45) and (age 47). They were third cousin once removed. He a great x 4 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward III of England.
On 19 May 1527 [her father-in-law] Henry Percy 5th Earl of Northumberland (age 49) died. His son [her husband] Henry Percy 6th Earl of Northumberland (age 25) succeeded 6th Earl of Northumberland, 9th Baron Percy of Alnwick, 17th Baron Percy of Topcliffe, 8th Baron Poynings. Mary Talbot Countess Northumberland by marriage Countess of Northumberland.
In or before 1528 [her brother-in-law] Thomas Percy (age 24) and Eleanor Harbottle (age 23) were married. He the son of Henry Percy 5th Earl of Northumberland and (age 50). They were third cousins. He a great x 4 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.
On 02 Jun 1537 [her husband] Henry Percy 6th Earl of Northumberland (age 35) died. His brother [her brother-in-law] Thomas Percy (age 33) should have succeeded but he had been attainted.
On 02 Jun 1537 [her brother-in-law] Thomas Percy (age 33), Francis Bigod (age 29), and John Bulmer and Ralph Bulmer were hanged at Tyburn [Map].
In 1538 [her former brother-in-law] Ingelram Percy (age 32) died at Tower of London [Map].
On 26 Jul 1538 [her father] George Talbot 4th Earl of Shrewsbury (age 70) died at Wingfield, Suffolk. He was buried at Sheffield Cathedral [Map]. His son [her brother] Francis Talbot 5th Earl of Shrewsbury (age 38) succeeded 5th Earl of Shrewsbury, 5th Earl Waterford, 10th Baron Furnivall, 14th Baron Strange Blackmere, 11th Baron Talbot.
In 1540 [her former sister-in-law] Margaret Percy Baroness Clifford (age 40) died.
On 16 Apr 1572 Mary Talbot Countess Northumberland died.
Paternal Family Tree: Talbot
Maternal Family Tree: Aoife NI Diarmait Macmurrough Countess Pembroke and Buckingham 1145-1188
Descendants Family Trees:
John of Gaunt 1st Duke Lancaster 1340-1399
Ralph Neville 1st Earl of Westmoreland 1364-1425
Joan Beaufort Countess of Westmoreland 1379-1440
John Neville 3rd Baron Neville of Raby 1337-1388
Maud Percy Baroness Neville Raby
Alice Montagu 5th Countess of Salisbury 1407-1462
Richard Neville 5th Earl Salisbury 1400-1460
Kings Wessex: Great x 13 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 11 Grand Daughter of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 17 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 12 Grand Daughter of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 4 Grand Daughter of King Edward III of England
Kings Scotland: Great x 8 Grand Daughter of William "Lion" I King Scotland
Kings Franks: Great x 10 Grand Daughter of Louis VII King Franks
Kings France: Great x 6 Grand Daughter of Philip "The Fair" IV King France
Great x 4 Grandfather: Gilbert Talbot 3rd Baron Talbot 8 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: Richard Talbot 7th Baron Strange Blackmere 4th Baron Talbot 2 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Petronella Butler
Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandfather: John "Old Talbot" Talbot 1st Earl of Shrewsbury 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Strange 4th Baron Strange Blackmere
4 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Ankaret Strange 7th Baroness Strange Blackmere, Baroness Talbot 5 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandmother: Mary Fitzalan Baroness Strange Blackmere
5 x Great Grand Daughter of King John "Lackland" of England
Great x 1 Grandfather: John Talbot 2nd Earl of Shrewsbury 4 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Neville 3rd Baron Neville of Raby 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Thomas Neville Baron Furnivall 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Maud Percy Baroness Neville Raby 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Maud Neville 6th Baroness Furnivall 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandfather: William Furnival 4th Baron Furnivall
5 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Joan Furnival 5th Baroness Furnivall 6 x Great Grand Daughter of King John "Lackland" of England
GrandFather: John Talbot 3rd Earl of Shrewsbury 5 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: James Butler 2nd Earl Ormonde 1331-1382 Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: James Butler 3rd Earl Ormonde 1359-1405 2 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth Darcy Countess Ormonde 1332-1390
Great x 2 Grandfather: James "White Earl" Butler 4th Earl Ormonde 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Welles 4th Baron Welles
Great x 3 Grandmother: Anne Welles Countess Ormonde 1360-1397 6 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Maud Ros Baroness Welles
5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Elizabeth Butler Countess Shrewsbury and Waterford 1424-1473 4 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Thomas Beauchamp 11th Earl Warwick
6 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: William Beauchamp 1st Baron Bergavenny 5 x Great Grand Son of King John "Lackland" of England
Great x 4 Grandmother: Katherine Mortimer Countess Warwick 1314-1369
4 x Great Grand Daughter of King John "Lackland" of England
Great x 2 Grandmother: Joan Beauchamp Countess Ormonde 3 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Richard Fitzalan 9th Earl Surrey 11th Earl Arundel 2 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Joan Fitzalan Baroness Bergavenny 2 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Elizabeth Bohun Countess Arundel and Surrey 1350-1385
Great Grand Daughter of King Edward "Longshanks" I of England
Father: George Talbot 4th Earl of Shrewsbury 3 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Ralph Stafford 1st Earl Stafford 7 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: Hugh Stafford 2nd Earl Stafford 1336-1386 2 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Margaret Audley Countess Stafford
Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandfather: Edmund Stafford 5th Earl Stafford 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Thomas Beauchamp 11th Earl Warwick 6 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandmother: Philippa Beauchamp Countess Stafford 1334- 5 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandmother: Katherine Mortimer Countess Warwick 1314-1369 4 x Great Grand Daughter of King John "Lackland" of England
Great x 1 Grandfather: Humphrey Stafford 1st Duke of Buckingham Great Grand Son of King Edward III of England
Great x 4 Grandfather: King Edward III of England
Son of King Edward II of England
Great x 3 Grandfather: Thomas of Woodstock 1st Duke of Gloucester Son of King Edward III of England
Great x 4 Grandmother: Philippa of Hainault Queen Consort England 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Anne of Gloucester Plantagenet Countess Eu and Stafford Grand Daughter of King Edward III of England
Great x 4 Grandfather: Humphrey Bohun 7th Earl Hereford 6th Earl Essex 2nd Earl of Northampton Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Eleanor Bohun Duchess Gloucester 2 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Joan Fitzalan Countess Essex, Hereford and Northampton 2 x Great Grand Daughter of King Henry III of England
GrandMother: Catherine Stafford Countess Shrewsbury and Waterford 1437-1476 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Ralph Neville 2nd Baron Neville of Raby 8 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: John Neville 3rd Baron Neville of Raby 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Alice Audley Baroness Greystoke and Neville 3 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ralph Neville 1st Earl of Westmoreland 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Henry Percy 10th and 2nd Baron Percy 5 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Maud Percy Baroness Neville Raby 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Idonia Clifford Baroness Percy 4 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Anne Neville Duchess Buckingham Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: King Edward III of England Son of King Edward II of England
Great x 3 Grandfather: John of Gaunt 1st Duke Lancaster Son of King Edward III of England
Great x 4 Grandmother: Philippa of Hainault Queen Consort England 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Joan Beaufort Countess of Westmoreland
Grand Daughter of King Edward III of England
Great x 4 Grandfather: Giles "Payne" Roet
Great x 3 Grandmother: Katherine Roet Duchess Lancaster
Mary Talbot Countess Northumberland -1572 4 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Nicholas Hastings
Great x 3 Grandfather: Ralph Hastings
Great x 4 Grandmother: Agnes Unknown
Great x 2 Grandfather: Ralph Hastings
Great x 3 Grandmother: Margaret Herle
Great x 1 Grandfather: Leonard Hastings
Great x 4 Grandfather: John Sutton 1st Baron Sutton
Great x 3 Grandfather: Thomas Sutton
Great x 4 Grandmother: Constantia Sampson Baroness Lexington
Great x 2 Grandmother: Maud Sutton
GrandFather: William Hastings 1st Baron Hastings 9 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandfather: Ralph Camoys 1st Baron Camoys
Great x 3 Grandfather: John Camoys 6 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandmother: Elizabeth Despencer Baroness Camoys
5 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 2 Grandfather: Thomas Camoys 1st Baron Camoys 7 x Great Grand Son of King Henry I "Beauclerc" England
Great x 4 Grandfather: William Latimer 3rd Baron Latimer of Corby
Great x 3 Grandmother: Elizabeth Latimer
Great x 4 Grandmother: Elizabeth Botetort Baroness Latimer Corby
Great x 1 Grandmother: Alice Camoys 8 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 3 Grandfather: William Louches
Great x 2 Grandmother: Elizabeth Louches Baroness Camoys
Mother: Anne Hastings Countess Shrewsbury and Waterford 1471-1520 3 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Ralph Neville 2nd Baron Neville of Raby 8 x Great Grand Son of King Henry I "Beauclerc" England
Great x 3 Grandfather: John Neville 3rd Baron Neville of Raby 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Alice Audley Baroness Greystoke and Neville 3 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Ralph Neville 1st Earl of Westmoreland 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: Henry Percy 10th and 2nd Baron Percy 5 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Maud Percy Baroness Neville Raby 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Idonia Clifford Baroness Percy 4 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Richard Neville Earl Salisbury Great Grand Son of King Edward III of England
Great x 4 Grandfather: King Edward III of England Son of King Edward II of England
Great x 3 Grandfather: John of Gaunt 1st Duke Lancaster Son of King Edward III of England
Great x 4 Grandmother: Philippa of Hainault Queen Consort England 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Joan Beaufort Countess of Westmoreland Grand Daughter of King Edward III of England
Great x 4 Grandfather: Giles "Payne" Roet
Great x 3 Grandmother: Katherine Roet Duchess Lancaster
GrandMother: Katherine Neville Baroness Bonville and Hastings 2 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: John Montagu 1st Baron Montagu, Baron Monthermer
Great x 3 Grandfather: John Montagu 3rd Earl Salisbury 2 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Margaret Monthermer Baroness Montagu 3rd Baroness Monthermer
Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandfather: Thomas Montagu 1st Count Perche 4th Earl Salisbury 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Adam Francis Mayor of London
Great x 3 Grandmother: Maud Francis Countess of Salisbury
Great x 1 Grandmother: Alice Montagu 5th Countess of Salisbury 1407-1462 3 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Thomas Holland 1st Earl Kent
4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Thomas Holland 2nd Earl Kent Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Joan "Fair Maid of Kent" Princess Wales Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandmother: Eleanor Holland 2 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Richard Fitzalan 10th Earl Arundel 8th Earl Surrey 5 x Great Grand Son of King John "Lackland" of England
Great x 3 Grandmother: Alice Fitzalan Countess Kent 1350-1416 2 x Great Grand Daughter of King Henry III of England
Great x 4 Grandmother: Eleanor Plantagenet Countess Arundel and Surrey
Great Grand Daughter of King Henry III of England