Guy I De Montreuil 
Guy I was born in 1025. Guy I's father was Hugh II De Montreuil and his mother was Bertha D'Aumale. His paternal grandparents were Enguerrand De Montreuil and Adele of Holland; his maternal grandfather was Guenfroi D'Aumale. He was an only child. He died at the age of 76 on October 13th, 1101.
They had a daughter named Agnes.
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