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

William de was born about 1275 in Cassington, Oxforshire, England.  William de's father was Simon (Baron) de MONTAGU and his mother was Hawaise de ST.  AMAND.  His paternal grandparents were William de MONTACUTE and Beota UNKNOWN.  He was an only child.  He died in Windsor Castle, Windsor, Berkshire, England.


William de's family with Elizabeth MONTFORT

They had a son named William de.