William BERTRAM, Baron of Mitford 
William was born in 1099 in Mitford, Northumberland, England. William 's father was Richard BERTRAM and his mother was Sybella MITFORD. His paternal grandparents were William BERTRAM and Miss de BOSTENBURGH; his maternal grandfather was John (Sir) MITFORD. He was an only child.
They had a son named Roger.
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Children
Roger BERTRAM
Roger was born in 1126 in Mitford, Northumberland, England. He died at the age of 46 in 1172.