According to Geoffrey of Monmouth, a king of Britain in the third or second century BC. He ruled over the land of Regnum Urien in what is now northwestern England. He was a just and noble king who was greatly admired by his people.
Urian succeeded his father, King Andragius, and was succeeded by King Eliud.
Source
Historia Regum Britanniae | Geoffrey of Monmouth, c. 1138