Joan St. Owen 
Joan was born about 1255 in Winchester, Hampshire, England. Joan's father was John St. Owen. She was an only child. Joan is no longer alive.
Joan and Richard de were married in a religious ceremony about 1279 in Cornwall, Cornwall, England. They had two sons and a daughter, named Edmund de, Geoffrey de and Joan de.
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Children
Edmund de Cornwall , Lord of Kynlet, Sir Knight
Edmund de was born before 1272 in Thonock, Gainsborough, Lincolnshire, England. He died in Kinlet, Cleobury Mortimer, Shropshire, England.
Joan de Cornwall
Joan de was born before 1273 in Thonock, Gainsborough, Lincolnshire, England. She died in 1341 in Howard Chapel, East Winch, Norfolk, England.
Geoffrey de Cornwall , 1st Lord of Burford, Sir
Geoffrey de was born about 1288 in Manor of Thunnock, Lincolnshire, England. He died before June 1335 in Burford, Shropshire, England.
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