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Female Joan de Cornwall Click to view Joan de Cornwall in the family tree

Joan de was born before 1273 in Thonock, Gainsborough, Lincolnshire, England.  Joan de's father was Richard de Cornwall , Lord of Thunnock, Sir and her mother was Joan St. Owen.  Her paternal grandparents were Richard Plantagenet , Earl of Cornwall, HRE and Joan Valletort; her maternal grandfather was John St. Owen. She had two brothers named Edmund de and Geoffrey de.  She was the second oldest of the three children.  She died in 1341 in Howard Chapel, East Winch, Norfolk, England.

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