Guillaume I de Ponthieu was born circa 915 to Herbouin II de Ponthieu (c890-c945) and died circa 980 of unspecified causes. Notable ancestors include Charlemagne (747-814). Ancestors are from Germany, Belgium, France.


Offspring of Guillaume de Ponthieu and unknown parent
Name Birth Death Joined with
Hildouin III de Ponthieu (c933-c1009) 933 1009 Hersende la Pieuse de Ramerupt (c930-?)
Adélaïde de Blois (c916-c963)

Footnotes (including sources)

‡ General

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