 Ranulph de Mortemer was born in Normandy before 1070 and died in 1104 or after, at un unknown date.He was the son of the Norman baron Roger of Mortemer and Hawise.His father assumed the name Mortemer after being given the possession of the castle and village of Mortemer in the Pays de Bray, called sometimes "Morte-mer sur Eaulne" or "en Brai".