Richard de Clare, Second Earl of Gloucester
Earl of Hertford. Usk; Kilkenny.
Robert FitzHamon, Lord of Glamorgan
Earl of Gloucester. Lord of Creully in Calvados, Governor of Caen.
Only referred to as Earl of Gloucester by Dugdale.
The Complete Peerage Vol.v,p683.
Henry de Beaumont, 1st Earl of Warwick
The Complete Peerage v,XIIpII,pp.357-360.