•
Siegfried Lipiner (1856–1911), Austrian poet and author •
Siegfried Wagner (1869–1930), German composer, conductor, and opera director, son of Richard Wagner •
Siegfried "Fritz" Flesch (1872–1939), Austrian saber fencer •
Siegfried Translateur (1875–1944), Austrian composer of dance music •
Siegfried Sassoon (1886–1967), English poet, named Siegfried by his mother because of her love of Wagner's operas •
Siegfried Kracauer (1889–1966), German writer, journalist, sociologist, cultural critic, and film theorist •
Siegfried Aram (1891–1978), German lawyer and cultural politician •
Siegfried Bernfeld (1892–1953), Austrian psychologist, educator, and writer •
Siegfried Kasche (1903–1947), German Nazi Storm Trooper officer and ambassador executed for war crimes •
Siegfried Uiberreither (1908–1984), Austrian Nazi Gauleiter and Reichsstatthalter •
Siegfried Fehmer (1911–1948), German Nazi Gestapo officer executed for war crimes •
Siegfried Seidl (1911–1947), Austrian Nazi commander of the Theresienstadt concentration camp executed for war crimes •
Siegfried Lowitz (1914–1999), German actor •
Siegfried Rapp (1915–1982), one-armed German pianist •
Siegfried Freytag (1919–2003), German World War II Luftwaffe pilot •
Siegfried Buback (1920–1977), Attorney General of Germany •
Siegfried Lenz (1926–2014), German writer •
Siegfried Böhm (1928–1980), East German politician •
Siegfried Ziering (1928–2000), German-born American business executive, playwright and philanthropist •
Siegfried Großmann (1930–2025), German theoretical physicist •
Siegfried Rauch (1932–2018), German actor •
Siegfried Wustrow (1936–2023), German cyclist •
Siegfried Fischbacher (1939–2021), German-American magician •
Siegfried Jerusalem (born 1940), German operatic tenor •
Siegfried Melzig (1940–2023), German football player and manager •
Siegfried Zielinski (born 1951), German media theorist == Fictional characters ==