
1) British traditional history 2) Monarch of Cornwall
Found on
https://www.crosswordclues.com/clue/caradocus

Caradocus (middle Welsh: Karadawc), according to Geoffrey of Monmouth`s Historia regum Britanniae, a pseudohistorical account of the kings of the Britons, was the duke of Cornwall under the reign of Octavius, who became king of Cornwall and died during the Emperor Magnus Maximus` reign. Caradocus was the Duke of Cornwall during the reign of Octa.....
Found on
http://en.wikipedia.org/wiki/Caradocus
No exact match found.