He was the son of King Rivallo and was succeeded by Sisillius I, and then Jago, who was Gurgustius' nephew. Geoffrey has nothing to say of him beyond this.[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.