Joan ST. OWEN 
Joan was born about 1255 in Winchester Buckley, Hampshire, England. Joan's father was John ST. OWEN. She was an only child. Joan is no longer alive.
They had a son named Geoffrey de.
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Children
Geoffrey de CORNWALL
Geoffrey de was born about 1288 in Manor of Thunnock, Lincolnshire, England. He died before June 1335 in Burford, Shropshire, England.