Marie de St Pol
Marie de St Pol, Countess of Pembroke (c. 1303–1377), was a daughter of Guy IV of Châtillon, Count of Saint-Pol, and a great-granddaughter of Henry III. In 1321 she married Aymer de Valence, Earl of Pembroke, and was widowed in June 1324; the marriage was childless. She founded Pembroke College, Cambridge.
Edward III exempted her from the 1337 seizure of alien lands, but Charles V confiscated her French estates in 1372. She died in March 1377 and was buried at Denny Abbey in the habit of a Franciscan nun.