Cunedagius (Latinized form; Welsh: Cunedda) was a legendary king of the Britons, as recounted by Geoffrey of Monmouth. He was the son of Henwinus, Duke of Cornwall, and Regan, the daughter of King Leir.
Cunedagius, grandson of Leir, despised the rule of his aunt Cordelia. With the help of his cousin Marganus, Cunedagius took over the kingdom from Cordelia and ruled half of it. Following Cordelia's suicide, Cunedagius came to rule the region of Britain southwest of the Humber.
Two years after they split the island, Marganus invaded Cornwall and destroyed much of the land. Cunedagius met him in battle and defeated him. Marganus fled throughout Britain until he was cornered in Wales. Cunedagius killed him and became king of all of Britain. He ruled all of Britain for 33 years and was succeeded by his son, Rivallo.
- Henry Lewis (ed.), Brut Dingestow (University of Wales Press, 1942), p. 31.
- 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.
|Duke of Cornwall||Succeeded by|
|King of South Britain|
|King of North Britain|