Gunther (Gundahar, Gundahari, Latin Gundaharius or Gundicharius, and in Old Norse Gunnarr, anglicised as Gunnar) is a legendary king of the Burgundians of the early 5th century. Legendary tales about Gundaharius appear in Latin, medieval German, Old Norse, and Old English texts, especially concerning his relations with Siegfried (in Old Norse Sigurd) and the death of Gunther from treachery in the hall of Attila the Hun.