John ST. JOHN 
He had a biological son named Roger de.
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Personal Details
John ST. JOHN
John was born before 1066 in Staunton-St-John. Oxfordshire, England. He died in Falmont Castle, England.
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Children
Roger de ST. JOHN
Roger de was born before 1097 in St. Jean le Thomas, Manche, Normandy, France. He died about 1130 in Compton, Sussex, England.