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Male Sir. William Bertram Baron Click to view Sir. William Bertram Baron in the family tree

William was born about 1099 in <,Mitford,Northumberland,England>.1   William's father was Sir. Richard Bertram Knight and his mother was Sigel Mitford.  His paternal grandparents were William Bertram and Miss de Bostenburgh; his maternal grandparents were Viscount John de Mitford and Mrs. John de Mitford. He had a brother named Alexander.  He was the older of the two children.


William's family with Hawise Balliol

‌William and Hawise were married in a religious ceremony about 1125.1   They had four sons named Roger, Guy, William and Richard.

1 "Genealogical Research of Kirk Larson"
Further sources/citations:
"Héraldique européenne", "FamilySearch® Ancestral File™ v4.19"

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