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Wiki information Peredurus:
Peredurus is a legendary king of the Britons in Geoffrey of Monmouth's pseudohistorical chronicle Historia Regum Britanniae. According to Geoffrey he was the youngest son of King Morvidus and brother of Gorbonianus, Archgallo, Elidurus, and...
Runo was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He was the son of King Peredurus and was succeeded by his cousin Gerennus.