Constance married John STAFFORD about 19 Jan 1457 in Maxstoke Castle, Maxstoke, Warwickshire, England. John (son of Humphrey STAFFORD, [DUKE OF BUCKINGHAM] and Anne De NEVILLE, [DUCHESS OF BUCKINGHAM], son of Humphrey Stafford, Duke of Buckingham and Anne De Neville) was born about 1427 in , , Buckingham, Eng; died on 8 May 1473; was buried in Probably, Pleshey, Essex, England. [Group Sheet] [Family Chart]