Eustace fitz John

Eustace fitz John (died 1157), Constable of Chester, was a powerful magnate in northern England during the reigns of Henry I, Stephen and Henry II. From a relatively humble background in South East England, Eustace made his career serving Henry I, and was elevated by the king through marriage and office into one of the most important figures in the north of England. Eustace acquired a great deal of property in the region, controlled Bamburgh Castle, and served jointly with Walter Espec as justiciar of the North.