Gunther

From the Old German name Gundahar, derived from the elements gunda "war" and heri "army" (making it a cognate of Gunnar). This was the name of a semi-legendary 5th-century Burgundian king. He appears in the medieval German saga the Nibelungenlied, which has him wooing the Icelandic queen Brunhild. He wins her hand in marriage with the help of the hero Siegfried. He ultimately betrays Siegfried, but Siegfried's widow Kriemhild (Gunther's sister) takes her revenge upon him.

This was also the name of an 11th-century saint who was a hermit in Bavaria and Bohemia.