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

William De was born about 1242 in Uppingham, Rutlandshire, England.  William De's father was Peter De Montfort and his mother was Alice De Aldithley.  His paternal grandparents were Thurstan De Montfort and Miss; his maternal grandparents were Sheriff Henry De Aldithley and Bertrada De Mainwaring. He had two brothers named Peter De and Robert De.  He was the second oldest of the three children.

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