MyNDIR

Sigmundr is the brother of Signý and the father of her son, Sigfried, in Völsunga saga, an Old Norse legendary saga drawn from Germanic legends preserved in the Eddas. This saga inspired much of Richard Wagner's creation of Der Ring des Nibelungen.

In Wagner's second opera in Der Ring des Nibelungen, Die Walküre / The Valkyrie, Siegmund is Sieglinde's brother and the father of her son Siegfried.