Viscount of Conteville Herlevin De Conteville
Herlevin was born about 1001.  He died about 1066.  He was buried in Abbey of Grestain.

 see notes Robert de Mortain
Robert was born after 1040 in Normandy.  He died about 1090.  He was buried in Grestain.

 Odo
Odo is no longer alive.