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Male William de MONTAGU Click to view William de MONTAGU in the family tree

William de was born in Casssington, Oxfordshire, England.  William de's father was William de MONTAGU and his mother was Elizabeth MONTFORT.  His paternal grandparents were Simon (Baron) de MONTAGU and Hawaise de ST.  AMAND; his maternal grandparents were Peter de MONTFORT and Matilda de la WARR.  He was an only child.  He died in Windsor Castle, Berkshire, England.


William de's family with Katherine de GRANDISON

They had a daughter named Phillipa DE.