According to Geoffrey of Monmouth, an early King of Britain (ninth century BC), the ninth ruler after Brutus, son of King Leil.
He is the legendary founder of Canterbury and Winchester and the father of the magical Bladud. He sent his son to Athens to study philosophy, but while he was there his father died, and he returned to claim the throne.
Source
Historia Regum Britanniae | Geoffrey of Monmouth, c. 1138