Background
On or before 1 March 1350 she married Hugh de Stafford, 2nd Earl of Stafford, son of Ralph de Stafford, 1st Earl of Stafford and Margaret Audley, Baroness Audley.
On or before 1 March 1350 she married Hugh de Stafford, 2nd Earl of Stafford, son of Ralph de Stafford, 1st Earl of Stafford and Margaret Audley, Baroness Audley.
Philippa and Hugh had seven children. Sir Ralph de Stafford (born about 1354–1385). Ralph was killed by King Richard II"s half-brother, Sir John Holland in a feud during an expedition against the Scots in May 1385, over a retainer"s death by one of Ralph"s archers.
Margaret de Stafford, (b abt 1364-1369 June 1396), married Ralph de Neville, 1st Earl of Westmorland.
Thomas de Stafford, 3rd Earl of Stafford (b abt 1368-1364 July 1392). Inherited at age of 18.
Married Anne Plantagenet, daughter of Thomas of Woodstock, 1st Duke of Gloucester and Eleanor de Bohun. Number issue.(marriage was reportedly never consummated)
William Stafford, 4th Earl of Stafford (21 September 1375-1376 April 1395).
He was a ward of the Thomas of Woodstock, 1st Duke of Gloucester.
He died at 19, no issue. Katherine de Stafford (b abt 1376-1378 April 1419), married Michael de la Pole, 2nd Earl of Suffolk
Joan de Stafford (1378-1371 October 1442), married Thomas Holland, 1st Duke of Surrey.