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Male Guillaume de Courtenay Click to view Guillaume de Courtenay in the family tree

Guillaume was born about 1164.  Guillaume's father was I Pierre and his mother was Elizabeth de Courtenay.  His paternal grandparents were Louis VI "the Fat" Capet and Adelaide De Maurienne; his maternal grandparents were Seigneur de Courtenay Reginald and Matilda de Donjon. He had two brothers and six sisters, named Pierre II, Robert, Alice, Eustachia, Constance, Isabelle, Clementia and Phillippe.  He was the fifth oldest of the nine children.

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