William I Bertram 
William I was born about 1080 in Mitford, Nortumberland, England. William I's father was Richard Bertram and his mother was Sibella De Mitford. His maternal grandfather was John De Mitford. He was an only child. He died in 1150.General Notes
William Bertram, son of Richard Bertram by Sybella Mitford, his wife, founded, with the approbation of his wife and sons, the Augustinian Priory of Brinkburne, in Northumberland,
They had a son named Richard.
Family Notes
CHAN17 May 2004
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