Rivallo
Rivallo was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He came to power in 817BC.
He was the son of King Cunedagius and was noted as a young king who reigned with moderation. Geoffrey describes him as a "peaceful and... Wikipedia
Born: United Kingdom
Parents: Cunedagius
Grandchildren: Sisillius I and Jago of Britain
Children: Gurgustius