Richard de BERTRAM & Sibilla de MITFORD 
They had a son named William I.
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Personal Details
Richard de BERTRAM
Richard de was born about 1045 in Dignan, Normandy, France. He died about 1086 in Mitford Castle, Morpeth, Northumberland, England.
Sibilla de MITFORD
Sibilla de was born about 1048 in Mitford Castle, Morpeth, Northumberland, England. Sibilla de is no longer alive.
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Children
William I BERTRAM
William I was born about 1080 in Mitford Castle, Morpeth, Northumberland, England.