Geofroy I de Mayenne 
Geofroy I was born about 0920 in Mayenne, France. Geofroy I's father was Aubert de Mayenne and his mother was Melesinde de Mayenne. His paternal grandfather was Geslin de Mayenne; his maternal grandparents were Ruellan de Mayenne and Auvert. He was an only child.
They had a son named Juhel I.
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