Sigurd is the great hero of the "Völsunga Saga," honored as the "King of Warriors." His tragic end is then widely known to the world as the "Nibelungenlied" after several alterations. It is unclear whether he is the same person as Siegfried. It is also unclear whether he was the one who had defeated the evil spirit as depicted in the legends, and there is a possibility that both of them may have had actually defeated a "different" dragon.