Hugh I De Grentmesnil

Hugh I was born before 1014.  Hugh I's father was Robert De Grentmesnil and his mother was Hawise De Eschauffon.  His paternal grandfather was Gervase De Grentmesnil; his maternal grandparents were Giroie De Eschauffon and Gisele De Montfort.  He was an only child.  He died on February 22nd, 1094.