Robert I De+ Grandmesnil
Robert I De+ was born about 0960.  He died about 1040.

 Havoise+ Giroie-Echauffour
She died in 1079.

 Hugues De+ Grandmesnil
Hugues De+ was born before 1041 in Grandmesnil Calvados, Normandy, France.  He died on February 22nd, 1095.