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

Jean I's father was Bouchard de Avesnes and his mother was Margaret de Hainaut.  His paternal grandparents were Jacques de Avesnes and Adelphie de Guise; his maternal grandparents were Baldwin IX de Hainaut and Marie de Champagne. He had a half-brother named Guy.  He died in 1257.

Family Details of Jean I's family with Aleida

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