Anne de Mortimer

Arms of Anne Mortimer before her marriage to Richard of Conisburgh

Born on 27 December 1388,[2][3][4] Anne Mortimer was the eldest of the four children of Roger Mortimer, 4th Earl of March (1374–1398), and Eleanor Holland (1370–1405).[3] She had two brothers, Edmund, 5th Earl of March (1391–1425), and Roger (1393–1413?), as well as a sister, Eleanor.[3]

Anne's father was a descendant of Lionel, Duke of Clarence, second surviving son of King Edward III of England, an ancestry which made Mortimer a potential heir to the throne during the reign of the childless King Richard II. Upon Roger Mortimer's death in 1398, this claim passed to his son and heir, Anne's brother Edmund, Earl of March.[5] In 1399, Richard II was deposed by Henry IV, of the House of Lancaster, making Edmund Mortimer a dynastic threat to the new king, who in turn placed both Edmund and his brother Roger under royal custody.

Anne and her sister Eleanor remained in the care of their mother, Countess Eleanor, who, not long after her first husband's death, married Lord Edward Charleton of Powys.[5] Following their mother's death in 1405, the sisters fared less well than their brothers and were described as "destitute", needing £100 per annum for themselves and their servants.[6]

Conisbrough Castle, home of the family of Anne Mortimer's husband.

Around early 1408 (probably after 8 January),[7] Anne married Richard of Conisburgh (1385–1415), the second son of Edmund, Duke of York (fourth son of King Edward III). The marriage was undertaken secretly and probably with haste, without the knowledge of her nearest relatives, and was validated on 23 May 1408 by papal dispensation.[8]

Anne Mortimer and Richard of Conisburgh had two sons and a daughter:[9]

• Isabel of York (1409 – 2 October 1484), who in 1412, at three years of age, was betrothed to Sir Thomas Grey, son and heir of Sir Thomas Grey of Heaton (1384–1415), by whom she had one son.[10] Isabel married secondly, before 25 April 1426 (the marriage being later validated by papal dispensation), Henry Bourchier, 1st Earl of Essex, by whom she had issue.[11]
• Henry of York[12]
• Richard of York, 3rd Duke of York (22 September 1411 – 30 December 1460), Yorkist claimant to the English throne, and father of kings Edward IV and Richard III

Anne Mortimer died soon after the birth of her son Richard on 22 September 1411.[13] She was probably buried at Kings Langley, Hertfordshire, once the site of Kings Langley Palace,[14] perhaps in the conventual church that houses the tombs of her husband's parents Edmund of Langley and Isabella of Castile.

• CPR (1907). Calendar of Patent Rolls, Henry IV, vol. 3: 1405–1408. London: His Majesty's Stationery Office. hdl:2027/mdp.39015031079588.CS1 maint: ref=harv (link)
• Dugdale, William (1849). John Caley; Henry Ellis & Bulkeley Bandinel (eds.). Monasticon Anglicanum. 6 (1) (new ed.). London: T.G. March. p. 355.CS1 maint: ref=harv (link)
• Gransden, A. (1992). Legends, Traditions and History in Medieval England. London: Hambledon Press (published 1 July 1992). ISBN 978-1-85285-016-6.CS1 maint: ref=harv (link)
• Griffiths, R.A. (2004). "Mortimer, Edmund (V), fifth earl of March". Oxford Dictionary of National Biography (online) (online ed.). Oxford University Press. doi:10.1093/ref:odnb/19344.CS1 maint: ref=harv (link) (Subscription or UK public library membership required.)
• Harriss, G.L. (2012). "Richard, earl of Cambridge (1385–1415)". Oxford Dictionary of National Biography (online) (online ed.). Oxford University Press. doi:10.1093/ref:odnb/23502.CS1 maint: ref=harv (link) (Subscription or UK public library membership required.)
• Kirby, J.L. (1995). Calendar of Inquisitions Post Mortem, Volume 20: Henry V, 1413–1418. London: HMSO. pp. 138–158.CS1 maint: ref=harv (link)
• Pugh, T.B. (1988). Henry V and the Southampton Plot of 1415. Sutton Publishing. ISBN 978-0-86299-549-2.CS1 maint: ref=harv (link)
• Richardson, D. (2011). Kimball G. Everingham (ed.). Magna Carta Ancestry. 4 (2nd ed.). Salt Lake City. ISBN 978-1-4609-9270-8.
• Tout, T.F. (1894). "Mortimer, Roger (VI) de, fourth Earl of March" . In Lee, Sidney (ed.). Dictionary of National Biography. 39. London: Smith, Elder & Co.CS1 maint: ref=harv (link)

• The Cambridge conspiracy in The History of Sir John Oldcastle