List of Famous people named Otto

Otto Edelmann was an Austrian bass. He was born in Vienna and studied singing in Vienna with Gunnar Graarud. His debut was at Gera as Figaro in Mozart's The Marriage of Figaro. He later sang the Vienna State Opera, the Edinburgh Festival and the Metropolitan Opera. He sang at the Bayreuth Festival immediately after its reopening in 1951 after World War II, performing the role of Hans Sachs in Wagner's Die Meistersinger von Nürnberg. He also sang Ochs in Richard Strauss's Der Rosenkavalier at the first performances in the new Salzburg Festspielhaus in 1960. In 1957, he recorded the role of Wotan opposite Kirsten Flagstad in Georg Solti's recording of Act III of Wagner's Die Walküre. He died in Vienna.

Otto Loewi was a German-born pharmacologist and psychobiologist who discovered the role of acetylcholine as an endogenous neurotransmitter. For his discovery he was awarded the Nobel Prize in Physiology or Medicine in 1936, which he shared with Sir Henry Dale, who was a lifelong friend that helped to inspire the neurotransmitter experiment. Loewi met Dale in 1902 when spending some months in Ernest Starling's laboratory at University College, London.

Otto von Bülow was a German U-boat commander in World War II, and a captain in the Bundesmarine. He was a recipient of the Knight's Cross of the Iron Cross with Oak Leaves of Nazi Germany.