Duke

General sourcesHodgkin, Thomas. Italy and her Invaders. Clarendon Press: 1895.Lewis, Archibald R. "The Dukes in the Regnum Francorum, A.D. 550–751". Speculum, Vol. 51, No 3 (July 1976), pp. 381–410.Phillips, Walter Alison (1911). "Duke" . Encyclopædia Britannica. Vol. 8 (11th ed.). pp. 650–651.Stenton, Sir Frank M.Anglo-Saxon England Third Edition. Oxford University Press: 1971.Thompson, E. A. The Goths in Spain. Clarendon Press: Oxford, 1969.