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Male Jean Ier De Fiennes Click to view Jean Ier De Fiennes in the family tree

Jean Ier was born about 1265.  Jean Ier's father was Guillaume II De Fiennes and his mother was Blanche De Brienne.  His paternal grandparents were Enguerrand II De Fiennes and Agnès Ou Isabelle De Condé; his maternal grandparents were Jean De Brienne and Jeanne De Chateaudun.  He was an only child.  He died in 1333.


Jean Ier's family with Isabeau De Flandres

‌Jean Ier and Isabeau were married in a religious ceremony in 1307.  They had a daughter named Jeanne.

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