Jago (Welsh: Iago; sometimes Jaygo; James in English) was a legendary king of the Britons according to Geoffrey of Monmouth. He was the nephew of Gurgustius, succeeded his cousin Sisillius I to the throne and was succeeded by Sissillius' son Kimarcus.[1] Geoffrey has nothing more to say of him.[2]
^Geoffrey of Monmouth: The History of the Kings of Britain : an Edition and Translation of De Gestis Britonum (Historia Regum Britanniae), Boydell & Brewer, 1 Jan 2007, p.44.