Philippa Plantagenet, 5th Countess of Ulster

English Royalty
House of Plantagenet

Henry II Children    William, Count of Poitiers    Henry the Young King    Richard I    Geoffrey, Duke of Brittany    King John    Matilda of England    Leonora of England    Joan of England Richard I John Children    Henry III    Richard, Earl of Cornwall    Joan of England    Isabella of England    Eleanor of England Henry III Children    Edward I    Margaret of England    Beatrice of England    Edmund, Earl of Lancaster Edward I Children    Joan of England, Countess of Gloucester    Alphonso, Earl of Chester    Edward II    Thomas, Earl of Norfolk    Edmund, Earl of Kent Edward II Children    Edward III    John, Earl of Cornwall    Eleanor of England    Joan of England Edward III Children    Edward, Prince of Wales    Lionel, Duke of Clarence    John, Duke of Lancaster    Edmund, Duke of York    Thomas, Duke of Gloucester    Joan of England    Isabella of England Grandchildren     Richard II     Philippa, Countess of Ulster     Philippa of Lancaster     Elizabeth of Lancaster     Henry IV     Catherine of Lancaster     Edward, Duke of York     Richard, Earl of Cambridge     Constance of York     Anne of Gloucester Richard II

Philippa Plantagenet, (16 August 1355 – 5 January 1380/1381), Countess of Ulster suo 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.

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 and had a son called Lord Roger de Camoys.
• Roger Mortimer, 4th Earl of March (11 April 1374- 20 July 1398).
• Philippa de Mortimer (21 November 1375 - 24 September 1401). She married first Sir John Hastings 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).

Preceded by: Elizabeth de Burgh

Countess of Ulster

Succeeded by: Roger Mortimer