William I D' AVRANCHES 
He had a biological son named Simon .
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Personal Details
William I D' AVRANCHES
William I was born in 1120 in Folkestone, Kent, England. He died at the age of 57 in 1177 in Folkestone, Kent, England.
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Children
Simon D' AVRANCHES
Simon was born in 1160 in Folkestone, Kent, England. He died at the age of 43 in 1203 in Folkestone, Kent, England.