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Male Guillaume I de PONTHIEU Click to view Guillaume I de PONTHIEU in the family tree

Guillaume I de was born about 0915 in Ponthieu, Ain, France.  Guillaume I de's father was Roger I (Rotgaire) Comte de  AMIENS & MONTREUIL.  His paternal grandfather was Herlouin II, Duke d'Amiens & Comte de PONTHIEU.  He was an only child.  He died in 0979.


Guillaume I de's family with Maud de St Pol sur Mer de THEROUANNE

They had a son named Hilduin de.