Notable people
Notable peoplePoliticians and leadersScientists, inventors, and mathematiciansWriters and journalistsReligious figuresRevolutionaries and activistsPhilosophers and social scientistsWritersScientists, inventors and mathematiciansMusicians and composersPhilosophers, historians, political and social scientistsVisual artistsSports figuresMilitary leaders and theoristsRebels, revolutionaries and activistsEntertainersLeaders and politiciansExplorersDirectors, producers and screenwritersBusinesspeopleScientists and inventorsMathematiciansJournalistsArtistsMusiciansCriminalsFilmmakers
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- O SonfaKorean-Japanese academic (born 1956)
- O'Neill ministryThe Parliament of Northern Ireland was the home rule legislature created under the Governm
- Oberleutnant zur SeeOberleutnant zur See (OLt zS or OLZS in the German Navy, Oblt.z.S. in the Kriegsmarine) is
- ObersturmführerObersturmführer (German: , lit. 'Senior storm leader'; short: Ostuf) was a Nazi Germany pa
- OberweselOberwesel (German: ) is a town on the Middle Rhine in the Rhein-Hunsrück-Kreis (district)
- Objective stress rateIn continuum mechanics, objective stress rates are time derivatives of stress that do not
- Oblates of St. Francis de SalesThe Oblates of St. Francis de Sales (Latin: Oblati Sancti Francisci Salesii, O.S.F.S.) are
- Occupation of factoriesOccupation of factories is a method of the workers' movement used to prevent lock outs. Th
- October 12 (Eastern Orthodox liturgics)October 11 – Eastern Orthodox liturgical calendar – October 13
- October 22 GroupThe October 22 Group (Italian: Gruppo XXII Ottobre) was an Italian terrorist organisation,
- Odilo GlobocnikAustrian Nazi, SS officer, and Holocaust perpetrator (1904–1945)
- Odo the Good MarquisOdo (or Eudes) the Good Marquis (fl. 11th century), sometimes called Odobonus, was a Norma
- OdoacerRuler of Italy (c. 433 – 493)
- Old quantum theoryPredecessor to modern quantum mechanics (1900–1925)
- Oldfield ThomasBritish mammalogist (1858–1929)
- OleandraOleandra is a genus of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (
- OleariaOlearia, most commonly known as daisy-bush, is a genus of flowering plants belonging to th
- Oleg GrabarOleg Grabar (November 3, 1929 – January 8, 2011) was a French-born art historian and arche
- OlintepequeOlintepeque (Spanish pronunciation: ) is a town, with a population of 31,545 (2018 census)
- Olive Mount cuttingOlive Mount cutting, which was opened in 1830, is a 2-mile (3.2 km) sandstone railway cutt
- Olivier BlanchardFrench economist and professor (born 1948)
- Olke C. UhlenbeckOlke C. Uhlenbeck is a Professor Emeritus of Biochemistry at the University of Colorado Bo
- Olof PalmePrime Minister of Sweden (1969–76; 1982–86)
- Omali YeshitelaAmerican political activist (born 1941)
- Omid Payrow ShabaniOmid A. Payrow Shabani (1962-2023) was an Iranian philosopher and Professor of Philosophy
- On Growth and FormOn Growth and Form is a book by the Scottish mathematical biologist D'Arcy Wentworth Thomp
- On the Harmony of Religions and PhilosophyFasl al-Maqal fi ma bayn al-Hikma wa al-Shariah min Ittisal (Arabic: فصل المقال في ما بين
- One banThe Romanian one-ban coin is a unit of currency equalling one one-hundredth of a Romanian
- One LimassolOne Limassol, otherwise known as simply One, is a high-rise apartment building in Limassol
- Open Source Order of the Golden DawnThe Open Source Order of the Golden Dawn (OSOGD) was an esoteric community of magical prac
- Operation Freedom DealPart of the Vietnam and Cambodian Civil Wars (1970–1973)
- Operation KaveriOperation organized by the Indian Army (2023)
- Operation MoonwatchOperation Moonwatch (also known as Project Moonwatch and, more simply, as Moonwatch) was a
- Operation ServalFrench military operation in Mali (2013–14)
- Orator F. CookAmerican botanist (1867–1949)
- OrdnungspolizeiUniformed police force of Nazi Germany (1936–1945)
- Orissa ProvinceProvince of British India (1936–1947) and the Dominion of India (1947–1950)
- Orlando di LassoFranco-Flemish composer (1532–1594)
- Orlando Fals BordaOrlando Fals Borda (Barranquilla, 11 July 1925 - Bogotá, 12 August 2008) was a Colombian r
- Oronzio Gabriele CostaOronzo Gabriele Costa (26 August 1787, Alessano – 7 November 1867 Naples) was an Italian z
- Oscar AmeringerOscar Ameringer (August 4, 1870 – November 5, 1943) was a German-American Socialist editor
- Oscar Goldman (mathematician)Oscar Goldman (1925 – 17 December 1986, Bryn Mawr) was an American mathematician, who work
- Oscar Schindler (horse)Oscar Schindler (4 February 1992 – 13 February 2007) was an Irish Thoroughbred racehorse a
- OSIRIS-RExNASA asteroid sample return mission (2016-2023)
- Oskar SchindlerGerman industrialist and humanitarian (1908–1974)
- OsroeneAncient Arab kingdom in Upper Mesopotamia (132 BC–214 AD)
- Oswald SpenglerGerman polymath (1880–1936)
- Othon de la RocheOthon de la Roche, also Otho de la Roche (died before 1234), was a Burgundian nobleman of
- Otoya YamaguchiJapanese assassin (1943–1960)
- Ottavio PiccolominiItalian nobleman, army general of Spain and the Holy Roman Empire (1599–1656)
- Otto BütschliGerman biologist (1848–1920)
- Otto HesseLudwig Otto Hesse (22 April 1811 – 4 August 1874) was a German mathematician. Hesse was bo
- Otto KuntzeGerman botanist (1843–1907)
- Otto RahnGerman SS officer and writer (1904–1939)
- Otto SchillingOtto Franz Georg Schilling (3 November 1911 – 20 June 1973) was a German-American mathemat
- Otto SchottFriedrich Otto Schott (1851–1935) was a German chemist, glass technologist, and the invent
- Otto Stapf (botanist)Otto Stapf FRS (23 April 1857 – 3 August 1933) was an Austrian born botanist and taxonomis
- Otto Theodor BenfeyOtto Theodor Benfey (31 October 1925 – 24 January 2024) was a German-born American chemist
- Ottoman CyprusOttoman province (1571–1914)
- Ottoman EgyptAdministrative division of the Ottoman Empire from (1517–1867)
- Ottoman SyriaRegion of Syria under Ottoman rule (1516–1918)
- Ōuchi HyōeiŌuchi Hyōei (大内 兵衛, Ōuchi Hyōei, August 29, 1888 – May 1, 1980) was a Japanese economist.
- Ouyi ZhixuChinese Buddhist scholar monk (1599–1655)
- Owen HatherleyBritish writer (born 1981)