What is Rivallo?
'''Rivallo''' ({{lang-cy|Rhiwallon}}) was a [[legend]]ary king of the [[Britons (historic)|Britons]] as told by [[Geoffrey of Monmouth]]. He was the son of King [[Cunedagius]]. During the time he ruled he was troubled by disasters: a [[rain]] of [[blood]] which lasted three days, a terrible [[plague]], and a great swarm of [[fly|flies]]. After he died his son [[Gurgustius]] became king. {{multistub|UK|lit}} [[Category:History of the United Kingdom]]