John I de BERKELEY 
He had a biological son named Alexander.
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Personal Details
John I de BERKELEY
John I de was born in 1040 in Gloucestershire, England. He died at the age of 56 in 1096 in Gloucestershire, England.
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Children
Alexander BERKELEY
Alexander was born in 1081 in Towie, Banffshire, Scotland. He died at the age of 55 in 1136 in Cullen Castle, Auldhaven, Banffshire, Scotland.