Ranulf de Gernon, 4th Earl of Chester was the son of the magnate who originated in what city in Normandy?
Ranulf de Gernon, 4th Earl of Chester: Ranulf II (also known as Ranulf de Gernon) (1099–1153) was an Anglo-Norman potentate who inherited the honour of the palatine county of Chester upon the death of his father Ranulf le Meschin, 3rd Earl of Chester. Ranulf le Meschin, 3rd Earl of Chester: Ranulf le Meschin, 3rd Earl of Chester (1070−1129) was a late 11th- and early 12th-century Norman magnate based in northern and central England. Ranulf le Meschin, 3rd Earl of Chester:  Originating in Bessin in Normandy, Ranulf made his career in England thanks to his kinship with Hugh d'Avranches - the earl of Chester, the patronage of kings William II Rufus and Henry I Beauclerc, and his marriage to Lucy, heiress of the Bolingbroke-Spalding estates in Lincolnshire.
Bessin