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Male William III Nd Baron De Montagu Click to view William III Nd Baron De Montagu in the family tree

William III Nd Baron De was born about 1273 in Cassington, Oxfordshire, England.  William III Nd Baron De's father was Simon St Baron De Montagu and his mother was Hawise De St Amand.  His paternal grandparents were Simon De Montagu and Aufric De Courcy; his maternal grandparents were Ralph St Amand and Asceline Daubeny.  He was an only child.  He died on October 18th, 1319 in Gascony, France.


William III Nd Baron De's family with Elizabeth De Montfort

‌William III Nd Baron De and Elizabeth De were married in a religious ceremony about 1292 in Cassington, Oxfordshire, England.  They had a son named William De.

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