Lady Philippa Mortimer (21 November 1375 - 26 September 1400) was a medieval English noblewoman, the granddaughter of Lionel of Antwerp, 1st Duke of Clarence, and great-granddaughter of King Edward III.
[1] She was the second daughter of Edmund Mortimer, 3rd Earl of March, and his wife, Philippa Plantagenet,[2] the only child of Lionel, 1st Duke of Clarence, and Elizabeth de Burgh, Countess of Ulster.
[1] She firstly married John Hastings, 3rd Earl of Pembroke,[1] in 1389 at Kenilworth, Warwickshire.
He died on 30 December 1389, when he was 17 years old,[4] from injuries sustained whilst jousting against Sir John Des at King Richard II's Christmas court at Woodstock Palace.
Her second husband was Richard Fitzalan, 4th Earl of Arundel and 3rd Lord St. John, whose first wife had died in 1385.