A nobleman in Roman Briton who desired to succeed his uncle, Octavius, to the British throne. When Octavius chose Maximus, a Roman senator, Conan became enraged and declared war. Faced with little support from the other noblemen, however, he eventually made peace. In return, Maximus gave him the kingdom of Brittany and the lady Ursula, the daughter of King Dionotus of Cornwall. He thus became the first ruler of Brittany, according to Geoffrey.
One of Conan’s descendants, Constantine, was Arthur’s grandfather.
Historia Regum Britanniae | Geoffrey of Monmouth, c. 1138
Roman de Brut | Wace, c. 1155