Rederchius was a legendary king of the Britons according to Geoffrey of Monmouth's History of the Kings of Britain (1136). He was also known as RhydderchNational Library of Wales, Welsh Classical Dictionary, page 650 and came to power in 143BC.Monarchie Nobelesse website, Bretons
He was preceded by Redon and succeeded by Samuil Penissel.History of the Kings of Britain 3.19 at Wikisource. Lewis Thorpe's translation for Penguin Classics (p. 105) gives two kings following him, Samuil followed by Penessil.
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