Ann de Mortimer was the second eldest daughter of Alionore and Roger de Mortimer.
Anne de Mortimer, Countess of Cambridge (27 December 1390 – c. 21 September 1411) was the mother of Richard Plantagenet, 3rd Duke of York, and the grandmother of King Edward IV and King Richard III.
Anne Mortimer was born at New Forest, Westmeath, one of her family's Irish estates, on 27 December 1390, the eldest of the four children of Roger Mortimer, 4th Earl of March, and Lady Eleanor Holland. She had two brothers, Edmund Mortimer, 5th Earl of March, and Roger (born 23 April 1393, died c.1413), and a sister, Eleanor, who married Sir Edward de Courtenay (d. 5 December 1419), and had no issue.
Anne Mortimer's mother was the daughter of Thomas Holland, 2nd Earl of Kent, and Lady Alice FitzAlan, the daughter of Richard Fitzalan, 10th Earl of Arundel, and his second wife, Eleanor, daughter of Henry, 3rd Earl of Lancaster, grandson of King Henry III.
Thomas Holland was the grandson and senior heir to Joan of Kent.
County Westmeath (//; Irish: Contae na hIarmhí) is a county in Ireland. It is part of the Midlands Region and the province of Leinster. It is named after the ancient Kingdom of Meath (Old Irish: Mide). Westmeath County Council is the local authority for the county. The population of the county is 86,164 according to the 2011 census.
Following the Norman invasion of Ireland, the territory of the Kingdom of Meath was subsumed into the Lordship of Meath and granted by King Henry II of England, in his capacity as Lord of Ireland, to Hugh de Lacy in 1172. Following the failure of male heirs, the Lordship was split between de Lacy's great-granddaughters. The western part was awarded to Margery and her husband, John de Verdun while the eastern part, centred on Trim, was awarded to Maud.
Because King Richard II had no issue, Anne's father, Roger Mortimer, 4th Earl of March, was heir presumptive during his lifetime, and at his death in Ireland on 20 July 1398 his claim to the crown passed to his eldest son, Edmund.
On 30 September 1399, the fortunes of Anne Mortimer and her brothers and sister changed entirely. Richard II was deposed by the Lancastrians led by Henry Bolingbroke, who became King Henry IV and had his own son, the future King Henry V, recognised as heir apparent at his first Parliament. Anne's brothers, Edmund and Roger, were kept in custody by the new King at Windsor and Berkhampstead castles, but were treated honourably, and for part of the time brought up with the King's own children, John and Philippa.
According to Griffiths, Edmund Mortimer's sisters, Anne and Eleanor, who were in the care of their mother until her death in 1405, were not well treated by Henry IV, and were described as 'destitute' after her death.
Marriage and children
Anne Mortimer and Richard, Earl of Cambridge, had two sons and a daughter:
- Isabel of York (1409 – 2 October 1484), who in 1412, at three years of age, was betrothed to Sir Thomas Grey (1404 – d. before 1426), son and heir of Sir Thomas Grey (c.1385 – 1415) of Heaton in Norham, Northumberland, and his wife, Alice Neville, the daughter of Ralph Neville, 1st Earl of Westmorland, by whom she had one son.
- Henry of York.
Anne Mortimer died soon after the birth, on 22 September 1411, of her son, Richard. She was buried at Kings Langley, Hertfordshire, once the site of Kings Langley Palace, perhaps in the conventual church which houses the tombs of her husband's parents, Edmund of Langley, 1st Duke of York, and Isabel of Castile.
After Anne Mortimer's death, Richard, Earl of Cambridge, married Maud Clifford, divorced wife of John Neville, 6th Baron Latimer, and daughter of Thomas de Clifford, 6th Baron de Clifford, but had no issue by her.
This Neville family are once again introduced into line of relatives.