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Male GUGLIELMO I ESTENDART Click to view GUGLIELMO I ESTENDART in the family tree

GUGLIELMO I's father was BERNARD SIGNEUR de FONTENELLES.  He was an only child.  He died in 1271.1 


GUGLIELMO I's first family with MABEL de MARLEY

‌GUGLIELMO I and MABEL were married in a religious ceremony about 1235.1   They had a son named GUGLIELMO II (Senator).


GUGLIELMO I's second family with PETRONILLE de MESNIL REYNARD

They had a daughter named EUSTACHE.

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