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Ludwig Wittgenstein (Ludwig Josef Johann Wittgenstein, 1889 – 1951) was an Austrian-British philosopher.

Wittgenstein may also refer to:

• Wittgenstein (film), Derek Jarman's 1993 biopic of Ludwig Wittgenstein
• Wittgenstein family relatives of Ludwig
  • Palais Wittgenstein [ de] in Vienna, Austria, now demolished residence of the family
  • Haus Wittgenstein, residence of Margaret Stonborough-Wittgenstein in Vienna, Austria, partly designed by her brother Ludwig
• Wittgenstein or Wittgensteiner Land [ de], a former Westphalian principality merged with Kreis Wittgenstein before being incorporated into Kreis Siegen-Wittgenstein, Germany
  • Wittgenstein Castle, near Bad Laasphe, Germany, seat of the principality of Wittgenstein
  • Sayn-Wittgenstein, a German noble family, formerly counts of Wittgenstein
• Wittgenstein, a fictional computer in The Brave Little Toaster to the Rescue and The Brave Little Toaster Goes to Mars

People with the surname

Viennese Wittgensteins

• Karl Wittgenstein (1847–1913), Austrian steel tycoon and father of Ludwig
• Margaret Stonborough-Wittgenstein (Margarethe Anna Maria, 1882–1958 ), sister of Ludwig
• Paul Wittgenstein (1887–1961), pianist and brother of Ludwig
• Paul Wittgenstein (grandson of his namesake, 1907–1979), eccentric and subject of Thomas Bernard's book Wittgenstein's Nephew (1982)

Sayn-Wittgensteins

• Widukind von Wittgenstein [ de] (died 1272), abbott of Grafschaft Abbey
• Louis I, Count of Sayn-Wittgenstein (1532–1605), German nobleman
• Prince Peter Wittgenstein (1769–1843), Russian field marshal
• Wilhelm Ludwig Sayn-Wittgenstein, Prussian politician
• Ludwig zu Sayn-Wittgenstein-Berleburg (1799–1866), Russian aristocrat
• Princess Carolyne zu Sayn-Wittgenstein (1819–1887), Russian noblewoman, Franz Liszt's mistress and patron
• Heinrich Prinz zu Sayn-Wittgenstein (1916–1944), World War II German flying ace
• Botho Prinz zu Sayn-Wittgenstein-Hohenstein (1927–2008), German politician
• Richard, 6th Prince of Sayn-Wittgenstein-Berleburg (1934–2017), German businessman
• Princess Nathalie of Sayn-Wittgenstein-Berleburg (born 1975), Danish equestrian
• August Wittgenstein (August-Frederik Prinz zu Sayn-Wittgenstein-Berleburg, born 1981), German-Swedish actor

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