Gudrun ( GUUD-roon; Old Norse: Guðrún) or Kriemhild ( KREEM-hilt; Middle High German: Kriemhilt) is the wife of Sigurd/Siegfried and a major figure in Germanic heroic legend and literature. She is believed to have her origins in Ildico, last wife of Attila the Hun, and two queens of the Merovingian dynasty, Brunhilda of Austrasia and Fredegund. In both the Continental (German) and Scandinavian traditions, Gudrun/Kriemhild is the sister of the Burgundian king Gunther/Gunnar and marries the hero Siegfried/Sigurd.
https://en.wikipedia.org/wiki/Gudrun