Grimolt de Plessis
Grimolt was born about 0990 in Plessis, Normandy, France.  He died in 1047 in a dungeon.

 Matilda de Normandy

 Adelica de Plessis
Adelica was born about 1014 in Plessis, Normandy, France.

 Baron Roger de Montbray
Roger was born about 1020 in Montbrai near St Lo, Manche, Normandy, France.