All articles starting with O

Otto Muehl

Otto Muehl was an Austrian painter and action artist and a key member of Viennese Actionism. He founded the Friedrichshof commune and was convicted in 1991 for sexual abuse.

Otto Mühlbock (1906–1979) was a Dutch cancer researcher and endocrinologist at the Netherlands Cancer Institute who showed hormones alone can induce mammary cancer in mice and developed the GR mouse strain.

Otto Naegeli

Otto Naegeli (1871–1938) was a Swiss physician and hematologist who identified the myeloblast and lymphoblast in a 1900 paper and wrote Blutkrankheiten und Blutdiagnostik, a German hematology textbook.

Oct 15, 2026

Otto Neurath

Otto Neurath (1882–1945) was an Austrian philosopher, economist, and sociologist, a leading member of the Vienna Circle who founded the Isotype pictorial language and led the Unity of Science movement.

Otto Nordenskjöld

Otto Nordenskjöld (Nils Otto Gustaf Nordenskjöld) was a Swedish geographer and explorer who led the Swedish Antarctic Expedition of 1901–1904, during which his ship was crushed by ice.

Otto of Bamberg

Otto of Bamberg (c. 1060–1139) was Bishop of Bamberg from 1102 and a papal legate whose missions of 1124–1125 and 1128 converted Western Pomerania to Christianity.

Otto of Freising

Otto of Freising (c. 1112–1158) was a Cistercian monk, bishop of Freising, and leading medieval historian, uncle of Emperor Frederick Barbarossa, who wrote the Chronica and Gesta Friderici.

Otto of Greece

Otto of Greece (Όθων, 1815–1867), Bavarian Wittelsbach prince and first king of independent Greece, reigned 1833–1862 under regency, absolutism, then constitutional rule, until deposed and exiled to Bamberg.

Otto Ohlendorf

Otto Ohlendorf (1907-1951), German SS-Gruppenführer and lawyer-economist, headed RSHA Amt III (SD-Inland) and commanded Einsatzgruppe D, responsible for about 90,000 killings; chief defendant in the 1947-1948 Einsatzgruppen Trial, executed at Landsberg in 1951.

Otto Olsen

Otto Martin Olsen (1884-1953), Norwegian sport shooter; won 8 Olympic medals (4 gold) at Antwerp 1920 and Paris 1924 in running target and military rifle, plus 3 world titles; distinct from Danish pentathlete Otto Peder Olsen.

Otto Peltzer

Otto Peltzer (Otto der Seltsame), German middle-distance runner (1900-1970), held world records at 800m, 1000m and 1500m, beat Paavo Nurmi in 1926, was persecuted under the Nazis, imprisoned and sent to Mauthausen, then coached in India.

Otto Pfister

Otto Pfister (1900–1984) was a Swiss artistic gymnast who competed at the 1924 Paris and 1928 Amsterdam Olympics, winning a team bronze medal in 1924 and team gold in 1928.

Otto Pfleiderer

Otto Pfleiderer (1839–1908) was a German Protestant theologian who held chairs at Jena and Berlin, arguing that only Paulinism made the beginning of Christianity possible.

Otto Porter Jr.

Otto Porter Jr. (born 1993) is a retired American NBA forward, third overall pick in 2013 by the Wizards, later Bulls, Magic, Warriors, Raptors, and Jazz; 2022 NBA champion with Golden State, career 10.3 points per game.

Otto Preminger

Otto Ludwig Preminger (1905–1986), Austrian-born American film director and producer, directed Laura, Anatomy of a Murder, and Exodus, broke the Hollywood blacklist, and defied the Production Code with The Moon Is Blue.

Otto Redlich

Otto Redlich, born in Vienna in 1896, was an Austrian-born American chemist who published the 1949 Redlich–Kwong equation of state and the Redlich–Kister expansion while at Shell and UC Berkeley.

Otto Rehhagel

Otto Rehhagel (born 9 August 1938) is a German football manager, "King Otto", who coached Greece to the Euro 2004 title as 150-1 outsiders and holds the Bundesliga record of 832 matches as a head coach.

Oct 22, 2026

Otto René Castillo

Otto René Castillo was a Guatemalan poet and guerrilla fighter, author of the revolutionary anthem "Vámonos patria a caminar," tortured and killed by the army in 1967.

Sep 21, 2026

Otto Renner

Otto Renner (1883–1960) was a German botanist and plant geneticist who established plastid inheritance through studies of the evening primrose Oenothera, and was professor of botany at Jena and Munich.

Otto Richard Lummer

Otto Richard Lummer (1860–1925) was a German experimental physicist who, with Wien and Pringsheim at the Reichsanstalt in Berlin, verified the radiation laws and prompted Planck's 1900 quantum formula.

Otto Robert Frisch

Otto Robert Frisch was an Austrian-born British physicist who, with his aunt Lise Meitner, interpreted and named nuclear fission, proved it experimentally in 1939, and co-authored the 1940 Frisch–Peierls memorandum showing an atomic bomb was feasible.