Mary of Lancaster

Mary of Lancaster
Baroness Percy
Born	1320-21 Tutbury Castle, Staffordshire, England
Died	1 September 1362 (aged 41-42) Alnwick, Northumberland, England
Spouse	Henry Percy, 3rd Baron Percy
Issue	Henry Percy, 1st Earl of Northumberland Thomas Percy, 1st Earl of Worcester Maud Percy Mary, Baroness Ros
House	Plantagenet
Father	Henry, 3rd Earl of Lancaster
Mother	Maud Chaworth

Mary of Lancaster, Baroness Percy (1320 – 1 September 1362), was the youngest surviving child of Henry, 3rd Earl of Lancaster by his wife Maud Chaworth. Through her father, she was a great-granddaughter of Henry III of England.

Family

Mary was born in 1320 or 1321.^[1] She was a sister of Henry of Grosmont, 1st Duke of Lancaster, Maud, Countess of Ulster, Joan, Baroness de Mowbray, and Eleanor, Countess of Arundel. Through her brother Henry, she was the aunt of Blanche of Lancaster, first wife of John of Gaunt and mother of Henry IV of England.^[2]

Marriage

Near September 1334 at Tutbury Castle, she married Henry Percy,^[1] eldest son of Henry Percy, 2nd Baron Percy and Idoine de Clifford. He succeeded his father as 3rd Baron Percy in 1352.^[3]

They had the following surviving issue:

• Henry Percy, 1st Earl of Northumberland (10 November 1341 – 20 February 1408) married firstly Margaret Neville and secondly Maud, Baroness Lucy.
• Thomas Percy, 1st Earl of Worcester (1344–1403).
• Maud Percy, married Sir John de Southeray, illegitimate son of King Edward III and his mistress Alice Perrers.
• Mary, Baroness Ros (born 1360) married John de Ros, Baron Ros of Helmsley.

Death

Mary died at Alnwick, Northumberland, England on 1 September 1362, where she was also buried. Her husband Henry would marry a second time to Joan Orreby, daughter and heiress of John, 2nd Lord Orreby.

Ancestry

Ancestors of Mary of Lancaster

16. John of England               8. Henry III of England                       17. Isabella of Angoulême               4. Edmund Crouchback, 1st Earl of Lancaster                             18. Ramon Berenguer IV, Count of Provence               9. Eleanor of Provence                       19. Beatrice of Savoy               2. Henry, 3rd Earl of Lancaster[1]                                   20. Louis VIII of France               10. Robert I of Artois                       21. Blanche of Castile               5. Blanche of Artois                             22. Henry II, Duke of Brabant               11. Matilda of Brabant                       23. Marie of Hohenstaufen               1. Mary of Lancaster                                         12. Patrick de Chaworth                       6. Patrick de Chaworth, Lord of Kidwelly                             13. Hawise de London                       3. Maud Chaworth[1]                                   28. William Beauchamp               14. William de Beauchamp, 9th Earl of Warwick                       29. Isabella Mauduit               7. Isabella de Beauchamp                             30. John FitzGeoffrey               15. Maud FitzJohn                       31. Isabel Bigod

References

1. Weir 2008, p. 80.
2. Weir 2008, pp. 77–80.
3. Bean 2004.

Works cited

• Bean, J.M.W. (2004). "Percy, Henry, third Lord Percy (c.1321–1368)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/21930. (Subscription or UK public library membership required.)
• Weir, Alison (2008). Britain's Royal Families, The Complete Genealogy. Vintage Books. ISBN 978-0-09-953973-5.