Dyfnwal Moelmud (Welsh for "Dyfnwal the Bald and Silent"; Latin: Dunvallo Molmutius) was accounted as an early king and lawmaker among the Welsh, credited with the codification of their standard units of measure. He also figures as a legendary king of the Britons in Geoffrey of Monmouth's pseudohistorical History of the Kings of the Britons.
In Geoffrey's account, Dyfnwal was the son of Cloten, the King of Cornwall, and he restored order after the "Civil War of the Five Kings". His family were a cadet branch of the dynasty of Brutus, the dominant line having ended with Porrex I before the civil war.
Dyfnwal was the King of Cornwall during the war created in the power vacuum left by Porrex I. He was braver and more courageous than all the other kings in the war. He defeated Pinner, the king of Loegria. In response, Rudaucus, king of Cambria, and Staterius, king of Albany, allied together and destroyed much of Dyfnwal's land. The two sides met in battle and were stalemated. Dyfnwal then took 600 of his men and himself and dressed themselves in the armour of the dead enemies. They led a charge deep into enemy lines where they killed the two kings. After this battle, Dyfnwal destroyed the remaining defences of the kings and pillaged their lands.
Following the defeat of the rival kings, Dyfnwal created a crown like that of his predecessors and claimed the throne of Britain. He created a set of rules for the kingdom called the Molmutine Laws, which nearly ended robbery within his kingdom and lasted for many centuries. He reigned in peace and prosperity for forty years then died and was buried in the Temple of Concord, a tribute to his laws, which resided in Trinovantum. His death sparked another civil war between his two sons, Belinus and Brennius.
- Lloyd, John Edward (1894). "Moelmud, Dyfnwal". In Lee, Sidney. Dictionary of National Biography. 38. London: Smith, Elder & Co.
|King of Cornwall||Succeeded by|
Belinus (South Britain)
Brennius (North Britain)
|King of Loegria|
|King of Kambria|
|King of Albania|
Title last held byPorrex I
|King of Britain|