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Male Mathieu Ier De Beaumont-Sur-Oise Click to view Mathieu Ier De Beaumont-Sur-Oise in the family tree

Mathieu Ier was born about 1075.  Mathieu Ier's father was Yves III De Beaumont-Sur-Oise and his mother was Adélaïde De Gournay.  His paternal grandparents were Yves II De Beaumont-Sur-Oise and Emma N...; his maternal grandparents were Hugues III De Gournay and Basilie N.... He had a brother and a sister, named Hugues and Agnès.  He was the second oldest of the three children.  He died in 1152.


Mathieu Ier's family with Béatrice Ou Emma De Clermont

‌Mathieu Ier and Béatrice Ou Emma were married in a religious ceremony before 1101.  They had a son named Mathieu II.

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