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Male William I Bertram , of Mitford, Sir Click to view William I Bertram , of Mitford, Sir in the family tree

William I was born about 1080 in Mitford Castle, Morpeth, Northumberland, England.  William I's father was Richard Bertram , Sir Knight and his mother was Sibella de Mitford.  He was an only child.  He died in 1150.


William I's first family with Hawise de Merlay

‌William I and Hawise de were married in a religious ceremony before 1134 in 2nd wife?.  They had a son named Richard I.


William I's second family with Hawise de Baliol , Heiress of Stainton

They had a son named Roger I.

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