Margaret married John (1st Duke of Norfolk) Howard on 20 Feb 1467 in Stoke By Nayland, Suffolk, England. John (son of Sir Robert Howard and Lady Margaret de Mowbray) was born in 1420 in Tendring, Essex, England; died on 22 Aug 1485 in Killed in the Battle of Bosworth Field, Leicestershire, England. [Group Sheet] [Family Chart]