Sigurð

Sigurd (Old Norse: Sigurðr) is a legendary hero of Norse mythology, as well as the central character in the Völsunga saga. The earliest extant representations for his legend come in pictorial form from seven runestones in Sweden and most notably the Ramsund carving (c. 1000) and the Gök Runestone (11th century).

As Siegfried, he is one of the heroes in the German Nibelungenlied, and Richard Wagner's operas Siegfried and Götterdämmerung.

As Sivard Snarensven(d) he was the hero of several medieval Scandinavian ballads.

The name Sigurðr is not the same name as the German Siegfried. The Old Norse form of Siegfried would have been Sigfroðr. Sivard is a variant form of Sigurðr. These name forms all share the first element Sig-, which means victory (as do the German Sieg- and Dutch zege-).

In the Völsunga saga, Sigurd is supposedly the posthumous son of Sigmund and his second wife, Hiordis. Sigmund dies in battle when he attacks Odin (who is in disguise), and Odin shatters Sigmund's sword. Dying, Sigmund tells Hiordis of her pregnancy and bequeaths the fragments of his sword to his unborn son.

...
Wikipedia