Siegfried is a German language male given name, composed from the Germanic elements sig "victory" and frithu "protection, peace". The German name has the Old Norse cognate Sigfriðr, Sigfrøðr, which gives rise to Swedish Sigfrid (hypocorisms Sigge, Siffer), Danish/Norwegian Sigfred. In Norway, Sigfrid is given as a feminine name.
Notable people with the name include:
- Siegfried Lipiner (1856-1911), an Austrian poet and author
- Siegfried Wagner (1869-1930), German composer, conductor, and opera director, the son of Richard Wagner
- Siegfried "Fritz" Flesch (1872-1939), Austrian saber fencer
- Siegfried Translateur (1875-1944), an Austrian composer of dance music in the early 20th century
- Siegfried Sassoon (1886-1967), an English poet, named Siegfried by his mother because of her love of Wagner's operas.
- Siegfried Rapp (1915–1982), one-armed German pianist
- Siegfried Jerusalem (b. 1940), a German operatic tenor
- Siegfried Ziering (1928-2000), a German-born American business executive, playwright and philanthropist
- Sigurd or Siegfried, the legendary dragon-slaying hero in Nibelungenlied
- Siegfried, leading character in the opera of the same name
- Siegfried, the first of Fritz Lang's two-film series, "Die Nibelungen"
- Siegfried, a character in History's Strongest Disciple Kenichi
- Siegfried (Get Smart), fictional character in 1960s American comedy television series Get Smart
- Siegfried, a principal character in the ballet Swan Lake
- Siegfried Farnon, one of the main characters in All Creatures Great and Small
- Siegfried Schtauffen, main character of the Soul series of fighting games
- Dubhe Alpha Siegfried, Saint Seiya anime series character
- Siegfried Kircheis, Legend of the Galactic Heroes
- Siegfried, a recurring "Persona" in the Shin Megami Tensei series
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