Danius () was a legendary king of the Britons as recounted by Geoffrey of Monmouth. He came to power in 361BC.Monarchie Nobelesse website, Bretons

He was son of Sisillius II, brother of KinariusSacred Texts website, Histories of the Kings of Britain (Book III), by Geoffry of Monmouth, tr. by Sebastian Evans, (1904) and was succeeded by his illegitimate son Morvidus.

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