Robert de Mowbray

Robert de Mowbray (died 1125), a Norman, was Earl of Northumbria from 1086, until 1095, when he was deposed for rebelling against William Rufus, King of England. He was the son of Roger de Mowbray and nephew of Geoffrey de Montbray, bishop of Coutances. The family name derives from Montbrai in Manche, Normandy, Mowbray being an Anglicisation of it