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Male Jean I von Avesnes Click to view Jean I von Avesnes in the family tree

Jean I was born in April 1218 in Etroent, LUXEMBOURG.1   Jean I's father was Bouchard von Avesnes and his mother was Marguerite Countess von Flandern und Hainault.  His paternal grandparents were Jacques von Avesnes and Adelphie De Guise; his maternal grandparents were Baldwin IX von Flandern Count von Flandern and Marie von Champagne. He had two brothers named Baudouin and Bauldouin.  He was the second oldest of the three children.  He died at the age of 39 on December 24th, 1257 in Valenciennes, Nord, France.1 

Family Details of Jean I's family with Aleida Countess von Holland

1 World Family Tree Vol. 11, Ed. 1 @ Tree #3804

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