Guillaume I De+ Chaumont & Isabelle+ Capet 
They have a son named Osmond III De+.
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Personal Details
Guillaume I De+ Chaumont
Guillaume I De+ was born about 1095 in Chaumont-en-Vexin, Ile-de-France, France.
Isabelle+ Capet
Isabelle+ was born about 1100 in Paris, Seine, Ile-de-France, France. She died after 1175.
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Children
Osmond III De+ Chaumont
Osmond III De+ was born about 1117 in Chaumont-en-Vexin, Ile de France, France.