Porrex II was a legendary king of the Britons as recounted in Geoffrey of Monmouth's Historia Regum Britanniae. He came to power in 257BC.Monarchie Nobelesse website, Bretons

He was the son of Coel and the grandson of Catellus; he was succeeded by his son, Cherin.Sacred Texts website, Histories of the Kings of Britain (Book III), by Geoffry of Monmouth, tr. by Sebastian Evans, (1904)National Library of Wales, Welsh Classical Dictionary page 584

In some versions of the story, his father was King Millus.

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