GUILLAUME I Comte de MONTREUIL 
He had a biological son named Hilduin, Comte de.
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Personal Details
GUILLAUME I Comte de MONTREUIL
GUILLAUME I Comte de was born in 0915 in Ponthieu, Ain, France. He died at the age of 50 in 0965 in Ponthieu, Ain, France.
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Children
Hilduin, Comte de PONTHIEU
Hilduin, Comte de was born in 0940 in Ponthieu, Ain, France. Hilduin, Comte de is no longer alive.