Margaret married John de Vere, 13th Earl of Oxford after 1459. John (son of John of Oxford de Vere, 12th Earl of Oxford and Elizabeth Howard, Countess of Oxford) was born on 8 Sep 1442; died on 10 Mar 1512-1503 in Hedingham Castle, Essex, England; was buried in Colne Priory. [Group Sheet] [Family Chart]