Philippa Plantagenet, 5th Countess of Ulster
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Philippa Plantagenet, (16 August 1355 – 5 January 1380/1381), Countess of Ulster sui juris, was the daughter and only child of Lionel of Antwerp, 1st Duke of Clarence and Elizabeth de Burgh, 4th Countess of Ulster. Her father was the second son of King Edward III of England by his Queen consort Philippa of Hainault.
Philippa married Edmund Mortimer, 3rd Earl of March in 1368, an alliance that would have far-reaching consequences in English history. As a result of her seniority in the line of succession to the throne of England and her marriage into the powerful Mortimer family, her descendants eventually succeeded to the throne as the House of York under Edward IV.
[edit] Children
She had five children by her marriage to Edmund Mortimer:
- Elizabeth de Mortimer (12 February, 1370/1371 - 20 April, 1417). She married firstly Henry Percy and secondly Thomas Camoys with whom she had a son, Lord Roger de Camoys, and a daughter, Alice, who was in turn, the mother of William Hastings, Baron Hastings.
- Roger Mortimer, 4th Earl of March (11 April, 1374- 20 July, 1398). The House of York's claim to the throne was through his daughter and heir Anne de Mortimer.
- Philippa de Mortimer (21 November, 1375 - 24 September, 1401). She married first John Hastings, 3rd Earl of Pembroke c. 1385, secondly Sir Thomas Poynings of Basing and thirdly Richard Fitzalan, 11th Earl of Arundel.
- Edmund Mortimer (9 November, 1376 - 1409?). He married Catrin (Catherine) Glyndŵr the daughter of Owain Glyndŵr.
- Sir John de Mortimer (c. 1378 - 1424).
| Peerage of Ireland | ||
|---|---|---|
| Preceded by: Elizabeth de Burgh | Countess of Ulster | Succeeded by: Roger Mortimer |
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