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Male William De Montagu Click to view William De Montagu in the family tree

William De was born about 1302 in Cassington, Oxfordshire, Eng.  William De's father was William III Nd Baron De Montagu and his mother was Elizabeth De Montfort.  His paternal grandparents were Simon St Baron De Montagu and Hawise De St Amand; his maternal grandparents were Piers De Montfort and Maud De La Mare.  He was an only child.  He died in Windsor Castle, Windsor, Berkshire, England.


William De's family with Katherine Grandison

‌William De and Katherine were married in a religious ceremony in 1327 in Cassington, Oxfordshire, Eng.  They had a son and a daughter, named John De and Phillipa De.

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