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Male William I (Sir) BERTRAM Click to view William I (Sir) BERTRAM in the family tree

William I (Sir) was born in 1080 in Mitford Castle, Morpeth, Northumberland, England.  William I (Sir)'s father was Richard (Sir Knight) Bertram and his mother was Sibella de MITFORD.  His paternal grandparents were William BERTRAM and Miss de BOSTENBURGH; his maternal grandfather was John (Sir) de MITFORD.  He was an only child.  He died at the age of 70 in 1150.


William I (Sir)'s family with Hawise de BALIOL

They had a son named Roger I  (Sir Knight).