Dyfnwal Moelmud
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Dyfnwal Moelmud (Welsh for "Dyfnwal the Bald and Silent"; Latin: Dunvallo Molmutius; fl. c. 450–470[1]) was accounted as an early king and lawmaker among the Welsh, credited with the codification of their standard units of measure. He also figures as a legendary king of the Britons in Geoffrey of Monmouth's pseudohistorical History of the Kings of the Britons.[2]