Osbern FitzHerfast de Crepon of Normandy
Osbern FitzHerfast de Crepon of was born in Normandy, France.  He died about 1040 in Vaudreuil.

 Emma de Ivry
Emma was born in 1008 in Ivry-la-Bataille, Evereux, Eure, Normandy, France.  She died after 1034 in Normandy, France.

 Emma FitzOsbern
Emma was born before 1040 in Normandy, France.  She died after 1060 in Normandy, France.

 Osbern FitzOsbern
Osbern was born before 1040.

 William FitzOsbern
William was born before 1040 in France.  He died in Battle of Cassel in Normandy, France.

 William FitzOsbern de Breteuil
He died after 1050.