Svanhildr is the beautiful daughter of Sigurd and Gudrun in Germanic heroic legend, whose grisly death at the hands of her jealous royal husband Ermanaric was told in many northern European stories, including the Old Norse Poetic Edda, Prose Edda, and Völsunga Saga; the skaldic poem Ragnarsdrápa; the Danish Latin Gesta Danorum; and the German Latin Annals of Quedlinburg. Wikipedia