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Male Count William The 1. of House Avesnes Click to view Count William The 1. of House Avesnes in the family tree Click to view Count William The 1. of House Avesnes in the family tree View timeline for this person's branch of the family tree

William The 1. was born in 1286.  He died at the age of 51 on June 7th, 1337.


Family Details of William The 1.'s family with Countess Joan of House Valois

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Family Systems Theory.


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