Siegfried

Siegfried could refer to:

The opera by Richard Wagner; see Siegfried (opera).
The character in Norse mythology, Siegfried, model for the title character in the above opera (see Sigurd).
Sigfrid of Sweden, evangelist in Sweden and patron saint of Växjö
UFA's silent movie of 1924 by Fritz Lang.
the evil KAOS agent from the 1960s TV series Get Smart; see Siegfried (Get Smart)
Siegfried Fischbacher from Siegfried & Roy
A character (prince) in the ballet Swan Lake
Siegfried Schtauffen, the main character of the Soul Series of fighting videogames.