People starting with J
612,553 records.
- John of MirecourtFrench philosopher
- John of MonmouthAnglo-Norman feudal lord born in Wales
- John of MonmouthBishop of Llandaff
- John of MonmouthFeudal lord in the Welsh Marches, died 1257
- John of MontecorvinoDiplomat of the Holy See
- John of MontemaranoItalian bishop and saint
- John of MontsonDominican theologian and controversialist
- John of MoraviaPatriarch of Aquileia
- John of NaplesItalian Dominican fiar and philosopher
- John of NarbonneRoman Catholic bishop
- John of Nassau-DillenburgCount of Nassau-Dillenburg (1303-1328)
- John of Nassau-HadamarCount of Nassau-Hadamar
- John of Nassau-IdsteinCount of Nassau-Idstein (1629-1677)
- John of Nassau-WeilburgGerman count († 1365)
- John of Nassau-Wiesbaden-IdsteinCount of Nassau-Wiesbaden-Idstein (1426-1480)
- John of Nassau-Wiesbaden-IdsteinGerman count
- John of Nassau-Wiesbaden-IdsteinGerman canon
- John of Nassau-Wiesbaden-IdsteinGerman count and stadtholder
- John of NavarreCrown Prince of Navarre (1530)
- John of NepomukCatholic saint (1340-1393)
- John of Nicaeaarchbishop
- John of Nicomediaclergyman
- John of NikiuEgyptian priest
- John of Nostitz-Rieneck(1847-1915)
- John of Nottingham14th century magician
- John of NullyFrench knight
- John of OxfordBishop of Norwich; Dean of Salisbury
- John of OxneadBenedictine monk and chronicler
- John of PaduaArchitect at the court of Henry VIII
- John of Palatinate-Simmern, Archbishop of MagdeburgBishop of Münster and Archbishop of Magdeburg
- John of Palermonotary in the court of Frederick II, Holy Roman Emperor, and friend of Fibonacci
- John of Palisna14th-century Croatian nobleman
- John of ParisFrench philosopher
- John of ParmaItalian theologian (1208-1289)
- John of PatmosChristian saint and author of the Book of Revelation
- John of Pattishall(-1290)
- John of PaviaBishop of Pavia
- John of PecherskOrthodox hierarch, hegumen of the Kiev-Pechersk monastery
- John of PienzenauDefensor of the Fortress of Kufstein Fortress against the Emperor Maximilian I. in the "War of Succe
- John of Pilica
- John of PontoiseBishop of Winchester
- John of PortugalPortuguese infante (1326-1327)
- John of PrislopEastern Orthodox priest
- John of ProcidaItalian noble, diplomat and doctor
- John of PskovRussian saint
- John of RagusaCroatian Dominican theologian (ca. 1390-1443)
- John of Raqqaillegitimate Syriac Orthodox patriarch of Antioch
- John of RavennaItalian writer
- John of ReadingEnglish philosopher
- John of Relegemlandlord
- John of Rieneck
- John of RilaBulgarian hermit (876–946)
- John of RipaItalian philosopher and theologian
- John of RokycanCzech philosopher, religion writer, writer and theologist
- John of Rotselaarabbot of Averbode (Premonstratensians) in the 13th century
- John of RuysbroeckBrabantian mystic and writer (1293–1381)
- John of RéômeFrench Christian abbot
- John of SahagúnSpanish Augustinian friar, priest and saint
- John of Saint Omer
- John of Saint Sabasreligious person, writer
- John of Saint-DenisFrench Orthodox bishop (1905–1970)
- John of SalisburyEnglish philosopher and theologian (ca 1115-1180)
- John of Salm-Grumbachcount
- John of San Marthemonk
- John of Saxonyastronomer
- John of ScotlandKing of Scots
- John of Scotland, Earl of HuntingdonEnglish Earl
- John of Scythopolis6th-century bishop
- John of Segovia15th-century Spanish theologian and translator
- John of Senhoutcristian saint
- John of Serres
- John of Seville12th-century Castilian scholar
- John of Seville (9th century)religious
- John of Shanghai and San FranciscoEastern Orthodox ascetic (1896-1966)
- John of Sicilyastronomer active in Paris in the late 13th century
- John of SittingbournePrior of Christ Church Priory; Archbishop of Canterbury-elect
- John of St Amandphilosopher and pharmacist
- John of St GilesSt Giles, John of (d. 1259/60), Dominican friar and physician
- John of St JohnIrish bishop
- John of St. SamsonFrench Carmelite mystic and spiritual writer
- John of St. ThomasPortuguese philosopher
- John of Sterngassenphilosopher
- John of StolbergGerman nobleman (1549-1612)
- John of Strathbogie, Earl of AthollScottish noble
- John of Sutherland14th century Scottish noble
- John of SviatohirskOrthodox Christian saint (1795–1867)
- John of Tellabishop
- John of ThauMayor of Vienna, 16th Century
- John of the CrossSpanish mystic and Roman Catholic saint (1542–1591)
- John of the GratingCistercian Bishop of Aleth
- John of the SedrePatriarch of Antioch
- John of ThebesEgyptian Saint
- John of Thessaloniki
- John of ThoresbyBishop of St. David's; Bishop of Worcester; Archbishop of York; Lord Privy Seal; Lord Chancellor of
- John of Thérouannecanon regular
- John of Tilbury
- John of TobolskRussian saint
- John of ToledoEnglish Cardinal
- John of ToucyFrench Lord
- John of ToursBishop of Bath; Bishop of Wells
- John of TransylvaniaVoivode of Transylvania
- John of TrogirDalmatian Roman Catholic Bishop and saint in the middle ages
- John of TrokeloweEnglish chronicler
- John of TufaraItalian hermit
- John of TynemouthArchdeacon of Oxford; canon lawyer (d. 1221)
- John of TynemouthEnglish mathematician (13th century)
- John of TynemouthEnglish chronicler and hagiographer (14th century)
- John of Ufford
- John of UtynamReceiver of First English patent
- John of ValenceFrench abbot and bishop
- John of Valkenburg14th-century knight. Lord of Valkenburg and Monschau/Montjoie.
- John of ValladolidSpanish Jewish convert to Christianity
- John of Valois, Count of MontpensierFrench count
- John of VeniceGreat Moravian priest, councilor and diplomat Svätopluk I, adherent of the Latin rite and one of the
- John of VercelliItalian priest
- John of VigoSpanish pioneer of surgery
- John of ViktringAustrian abbot
- John of WaldsteinEst 1500 - 15 Jun 1576
- John of WalesWelsh theologian
- John of WallingfordAbbot of St Albans Abbey
- John of WallingfordBenedictine monk at the Abbey of St Albans, associate of Matthew Paris
- John of WarnetonFrench Roman Catholic bishop and blessed
- John of Wesel
- John of Westphaliaprinter in Aalst and Leuven
- John of WhithornScottish bishop
- John of WildeshausenBishop and Master General of the Dominican Order
- John of WinterthurGerman historian
- John of WorcesterEnglish monk and chronicler
- John of ÁvilaSpanish priest, Doctor of the Church
- John OFA Rheesinger
- John OfferBritish sociologist (born 1949)
- John OfferdahlAmerican football player
- John OfoegbuAmerican basketball player (born 1983)
- John Ofori-TenkorangGhanaian engineer and academic
- John OgborneEnglish engraver (1755–1837)
- John OgbuAmerican anthropologist (1939–2003)
- John OgburnAustralian artist (1925-2010)
- John OgdenBritish stage actor (d.1732)
- John OgdenAustralian photographer (born 1952)
- John OgdenAmerican marine biologist and behavioral ecologist
- John OgdenAmerican educator (1824-1910)
- John OgdenNew England colonist (1609–1682)
- John Ogden Murrayconfederate major and writer
- John OgdonEnglish pianist and composer (1937-1989)
- John OgilbyScottish academic, translator, theatrical impresario and cartographer (1600-1676)
- John OgiltreeCanadian baseball player
- John OgilvieScottish football player (1928-2020)
- John OgilvieScottish lexicographer
- John OgilvieSouth African cricketer
- John OgilvieChurch of Scotland minister and poet
- John OgilvieNew Zealand cricketer (1931-2021)
- John OgilvieScottish Jesuit saint and martyr
- John OgilvieNew Zealand cricketer
- John OgilvieCanadian businessman and miller
- John Ogilvie DavidsonCanadian surveyor
- John Ogilvy of Powrie1563 - 1609
- John Ogilvy-Grant, 7th Earl of SeafieldScottish Earl
- John Oglander(1737-1794); Warden of New College (1768-1794)
- John OglanderEnglish politicians
- John OgleEnglish army officer
- John OgleEnglish physician
- John Oglethorpe Wakelin BarrattBritish bacteriologist
- John OgonowskiAmerican pilot and agricultural activist
- John OgrodnickCanadian ice hockey player
- John OgstonFootballer (1939-2017)
- John OgwenWelsh actor
- John OhalaAmerican linguist (1941-2020)
- John Ohleyer MoseleyAmerican educator (1893–1955)
- John Ohlsonassociation football coach
- John OhmB.Ed in Electronics and Instrumentation Engineering from Visveswaraiah Technolog, Bangalore
- John Oinam
- John OjoAmerican football player (1990-)
- John OjukwuAmerican football player
- John Ojulu AryangAustralian basketball player (born 2009)
- John OkadaAmerican writer
- John Okafo
- John OkaforNigerian actor (1961–2024)
- John OkamotoAmerican politician
- John OkechukwuemekaNigerian politician
- John OkehurstEnglish politician
- John OkellBritish linguist
- John OkelloUgandan revolutionary (1937–1971)
- John Okeloassociation football player
- John OkemosOjibwe leader
- John OkeoverEnglish organist and composer
- John OkeyEnglish politician
- John OkillBritish shipbuilder
- John OkoliNigerian association football player
- John OkoroBE BTech in Computer Hardware, Visakhapatnam
- John OkoroNigerian athletics competitor
- John Okothrugby union player
- John Okoye Ebukaassociation football player
- John OkulPapua New Guinean rugby league footballer
- John OkumuKenyan physicist and academic administrator
- John Okute SicaCanadian author and historian (1890–1964)
- John Ola UlsetNorwegian biathlete
- John Oladipo OladitanNigerian athletics competitor
- John Olaf TodahlIllustrator, cartoonist, painter of naval themes
- John Olago Aluochpolitician
- John OlalereMS in Biochemistry, Lagos
- John Olaoluwa AdereyinwoOrdinary National Diploma in Computer Science from Wolex Polytechnic Lagos State, Iyana Ipaja,Lagos,Nigeria
- John OlarindeElectrical Engineering in Electronics and Instrumentation Engineering from God i, Nigeria
- John Olatunde AyeniNigerian lawyer and businessman
- John Olav EgelandNorwegian journalist and editor
- John Olav Fuglemarmy officer
- John Olav JohannessenNorwegian cross-country skier
- John Olav KrogNorwegian biologist (1918-2007)
- John Olav LarssenNorwegian missionary (1927–2009)
- John Olav NilsenNorwegian musician, singer and composer
- John Olav NorheimNorwegian association football player
- John Olav OldertrøenNorwegian writer
- John Olav Ågotnessport shooter
- John OlawoleHND in Mechanical Engineering ( Power and Plant ) from Federal Polythecnic Offa,, Lagos, Nigeria.
- John OlcayTurkish-American financier (1940–2014)
- John OldayBritish artist, cartoonist and writer (1905–1977)
- John OldcastleEnglish politician (1378-1417)
- John OldenAustrian-German film director, producer and writer
- John OldenstamSurinamese-Dutch singer, songwriter and musical actor
- John Olderorthopaedic surgeon
- John OldershawBritish clergyman
- John OldfieldEnglish army officer
- John OldfieldIrish footballer (1943-2002)
- John Oldfieldest. 24 Jun 1781 - 20 Oct 1860
- John Oldfieldcar designer
- John OldhamEnglish footballer
- John OldhamEnglish satirical poet and translator
- John OldhamAmerican colonist
- John OldhamAmerican basketball player and coach, college athletics administrator (1923–2020)
- John OldhamAustralian landscape architect
- John OldhamAmerican baseball player and coach
- John OldhamIrish engineer
- John OldmixonEnglish historian
- John Oldrid ScottEnglish architect (1841-1913)
- John Oldrin III(1726-1788) husband of Elizabeth Wolsey
- John Oldrin IV(1756-1827)
- John OldringCanadian politician
- John OldshueAmerican meteorologist
- John Ole AskedalNorwegian professor
- John Ole AspliNorwegian politician
- John Ole MoeNorwegian footballer
- John Ole MorkenNorwegian musician
- John OlenchalkAmerican football linebacker and center
- John OlerudAmerican baseball player
- John OlguinAmerican curator
- John OlinAmerican professional wrestler
- John OliphantBritish architect
- John Oliphant, 2nd Lord OliphantScottish landowner
- John OlivaresPublicidad in Merchandiser from Fundacion Universitaria Los Libertadores, Bogota or Bogotá
- John OliveAmerican basketball player-coach
- John OliveAustralian rugby league footballer
- John OliverCanadian politician
- John OliverBritish-American comedian and television host
- John OliverEnglish Royalist churchman, President of Magdalen College, Oxford, and Dean of Worcester
- John Oliverbishop (born 1935)
- John OliverWelsh athlete
- John OliverCanadian composer
- John OliverAustralian motorcycle speedway rider
- John OliverEnglish churchman, Canon law jurist
- John Oliver(1720-1778)
- John Oliverpuritan minister
- John OliverBritish-Canadian politician (1856–1927)
- John OliverWelsh-language poet
- John Olivercricketer (1918-1992)
- John OliverEnglish footballer (1867-?)
- John OliverEnglish glass painter and master mason
- John OliverNew Zealand firefighter
- John OliverArchdeacon of Leeds (1939-2018)
- John OliverBritish sprint canoer
- John OliverEnglish footballer, born 1915
- John Oliver AndrewsRoyal Air Force air marshal
- John Oliver ArnoldBritish metallurgist and writer
- John Oliver BarresCatholic bishop
- John Oliver Borleyzoologist
- John Oliver Brook HitchEnglish architect & British Army officer & MC (1887-1953)
- John Oliver CreightonAmerican astronaut
- John Oliver CurranIrish physician (1819–1847)
- John Oliver Frank KingmanBritish civil servant
- John Oliver Gunn Jr.American racing driver
- John Oliver Halstead PitneyAmerican lawyer
- John Oliver HendersonUnited States federal judge
- John Oliver HobbesAmerican writer (1867–1906)
- John Oliver KillensAmerican writer (1916–1987)
- John Oliver La GorceAmerican writer and explorer (1880-1959)
- John Oliver MusgraveMotor transport operator
- John Oliver Roberts(1924-2025) British naval officer
- John Oliver Udalsoldier and official (1926–2022)
- John Oliver WheelerCanadian geologist
- John OliveraB.Com in Commerce from Smt Chandibai Himathmal Mansukhani College, Ulhasnagar
- John Olivieirabusinessperson from the Netherlands
- John OllerAmerican biographer, historian, and former attorney
- John OlliffEnglish tennis player and sports journalist
- John OllisAmerican politician
- John OllivierNew Zealand politician (1812-1893)
- John Olmius, 1st Baron WalthamIrish Baron (1711-1762)
- John OlmstedAmerican activist (1938–2011)
- John OlneyAmerican medical doctor and neuropathologist (1931–2015)
- John Olof DahlgrenUnited States Marine Corps Medal of Honor recipient
- John Olof Ericssonwriter
- John Olof Hjalmar Svenfeltbusiness executive, industrialist
- John Olof ThorellAmerican singer
- John Olohi GoodnessI.A in sciences, Abuja
- John Olowgynecologist
- John Olsenpolitician, diplomat and football commissioner, Premier of South Australia (1945- )
- John OlsenDanish sculptor (1938)
- John OlsenAustralian artist (1928–2023)
- John OlsenDanish film producer (1888–1959)
- John OlsenNorwegian association football player (1928-2001)
- John Olsen HammerstadNorwegian painter (1842-1925)
- John OlsonAmerican musician and artist
- John OlsonAmerican politician
- John Olson20th century American politician
- John OlsonAmerican who pled guilty to forging thousands of Muhammad Ali and other autographs
- John OlsonPoet, writer
- John OlsonAmerican former combat photographer winner of the Robert Capa Gold Medal
- John OlssonSwedish architect (1929-2008)
- John OlssonSwedish lawyer (1858-1943)
- John OlszowkaProfessor of history, academic administrator
- John Olubi SodipoNigerian philosopher (1935-1999)
- John Olufemifootballer
- John OluluKenyan boxer
- John OlumbaMember of the Michigan State House of Representatives
- John Olusola Adeniranmathematician
- John Olu–MolomoNigerian footballer (born 1968)
- John OlverCanadian ice hockey player
- John Olverpolitician in Massachusetts, US
- John OlverEnglish rugby union footballer and coach
- John OlzardAustralian rugby league player
- John OmaginoMedical doctor, public health specialist
- John OmanScottish theologian
- John Omar LealB.Sc in Computer Networking from University of Santo Tomas, Ujjain
- John OmblerNew Zealand public servant
- John OmmanneyBritish Royal Navy admiral (1773-1855)
- John Ommanney HopkinsRoyal Navy admiral (1834-1916)
- John OmondiKenyan amateur wrestler
- John Omoniyi AbiriNigerian academic
- John OnaiyekanCatholic archbishop
- John OndawameIndonesian activist
- John Onesimus FosterAmerican Methodist minister and professor
- John Ongayo KokwaroKenyan botanist (1940-2019)
- John OngmanSwedish Baptist pastor (1844–1931)
- John OniansBritish art historian (born 1942)
- John OnojeMoldovan activist
- John Ontario MillerBritish colonial administrator (1857-1943)
- John Onyaene Dafiewhareanglican bishop in Nigeria
- John Onyemain Fashion Designing from Imagine Institute of Fellowship and Learning, Muzaffarnagar
- John Onyemenamin Environmental Management from University of Port Harcourt, Port Harcourt
- John OommenIndian engineer
- John OostendorpAmerican athlete
- John OostermanNew Zealand judoka (1941-)
- John OostromCanadian politician
- John OothoutAmerican banker (1789-1858)
- John OpdalNorwegian politician
- John Operator TiakiaNiuean politician
- John OpieBritish historical and portrait painter (1761-1807)
- John OpioUgandan boxer
- John Opoku-AgyemangGhanaian Catholic priest
- John Oponjo BenjaminSierra Leonean politician
- John OpperAmerican painter (1908-1994)
- John OppieAmerican reverend (1854-1880)
- John Oradanurse in Community Development from United States International University, Cagayan de Oro
- John Oramequestrian
- John OravainenAustralian swimmer
- John OrchardEnglish politician
- John Orchardresearcher
- John OrchardBritish actor (1928-1995)
- John OrchardAustralian politician
- John OrcsikAustralian actor
- John OrdScottish police man, folk song collector, antiquarian
- John OrdEnglish barrister and politician
- John OrdronauxAmerican Civil War army surgeon, a professor of medical jurisprudence, a pioneering mental health co
- John OrdronauxPrivateersman
- John OrdwayAmerican explorer
- John OrdwayAmerican diplomat (born 1950)
- John OreAmerican musician (1933–2014)
- John Oren ReedAmerican physicist
- John OrengeEnglish politician
- John OrfordBritish musician
- John Organ(d.1392) of London
- John OrganCanadian Anglican bishop
- John OrlandoNigerian association football player
- John Orlando ParryBritish actor, comedian and musician (1810–1879)
- John Orlando SummerhayesMedical missionary and surgeon (1869–1942)
- John OrlebarBritish Royal Navy officer; (1810-1891), surveyor of Newfoundland and Novia Scotia
- John OrlebarBritish Member of Parliament (1697-1765)
- John OrloffAmerican screenwriter
- John OrmanAmerican political figure
- John Orman GilbertBritish resident minister
- John Ormentogangster
- John Ormistonassociation football player (1880-1917)
- John OrmistonNew Zealand interventional cardiologist
- John OrmondNew Zealand farmer (1905-1995)
- John OrmondPoet, film-maker (1923–1990)
- John OrmondeIrish politician (1905-1981)
- John OrmsbyNew Zealand negotiator (1854–1927)
- John OrmsbyBritish translator
- John OrmsbyAmerican settler
- John Ormsby JohnsonBritish Royal Navy officer (1822-1881)
- John Ormsby VandeleurBritish Member of Parliament (1765-1828)
- John Ormsby VandeleurIrish politician (1767-1822)
- John Ormsby-Gore, 1st Baron HarlechBritish politician (1816–1876)
- John Orne GreenAmerican otologist (1841–1922)
- John Orne Johnson FrostAmerican painter (1852–1928)
- John OrobuluSolomon Islands footballer
- John Oroo OyiokaKenyan politician
- John OrozcoAmerican gymnast
- John Orozco CardonaIngenieria de Sistemas in Testing from Universidad Católica de Santa María, Ciudad Bolívar Colombia
- John OrpenChaplain to the British Armed Forces (1868-1950)
- John OrrScottish international lawn bowls player, born 1870
- John OrrIrish South African businessman
- John OrrScottish police officer
- John OrrBritish linguist (1885-1966)
- John OrrScottish rugby union player
- John OrrScottish bowls player (born 1995)
- John OrrAnglican bishop
- John OrrIrish Anglican priest
- John Orr YoungAmerican advertiser (1886-1976)
- John OrrellCanadian writer and academic (1934-2003)
- John Orrell LeverEnglish ship-owner and Member of Parliament for Galway, Ireland
- John Orrin SmithBritish wood-engraver (1799-1843)
- John OrrokBritish Army officer
- John OrsiAmerican football player and coach (1908-1978)
- John OrsinoAmerican baseball player
- John OrtbergAmerican Christian author
- John OrtegaUnited States Navy Medal of Honor recipient
- John OrtegaAmerican musician
- John OrtegonIngenieria in Telco from Compensar, Bogota
- John Ortell KingstonLeader of the Latter Day Church of Christ from 1948 until his death in 1987.
- John OrtizAmerican actor
- John OrtonAmerican baseball player (born 1965)
- John OrumEnglish churchman and academic
- John Orupmining engineer
- John Orus Bennett IIIAmerican politician
- John Orville NewtonAmerican politician, Maine (1864–1958)
- John OrwinEnglish rugby union footballer
- John OsakoAmerican judoka
- John Osbaldiston FieldBritish Colonial Service administrator
- John OsbornBritish sailor
- John OsbornBritish Conservative Party politician (1922-2015)
- John OsbornAmerican operatic tenor
- John Osborn WilliamsCanadian politician (1886-1963)
- John OsborneEnglish footballer (1940-1998)
- John OsborneBritish DJ
- John OsborneEnglish barrister
- John OsborneEnglish playwright (1929-1994)
- John Osborne(1690–1748) Church of Scotland minister
- John OsbornePolitician and union official from New South Wales, Australia (1878-1961)
- John Osborne(1842-1908) Wesleyan minister, journalist and secretary
- John OsborneBritish writer
- John OsborneMontserratian politician (1936-2011)
- John OsborneUnited States Navy Medal of Honor recipient
- John Osborne AustinGenealogical author and publisher
- John Osborne ClossNew Zealand physician
- John Osborne Jr.British jockey
- John Osborne VarianIrish-American poet (1863-1931)
- John Osborne, 11th Duke of LeedsBritish noble (1901-1963)
- John Oscar BimpongGhanaian politician
- John Oscar EgelandNorwegian businessman (1891-1985)
- John Oscar LindholmFinnish consul and businessman
- John Oscar LofbergFinnish-American classical philologist
- John Oscroftcricketer (1846-1885)
- John OscroftEnglish cricketer (1807-1857)
- John OsepchukAmerican microwave engineer (1927–2024)
- John Oskar Hammermixed martial arts fighter
- John Oslawskimusician, saxophonist
- John Osler Chattock HayesRoyal Navy admiral
- John OsmanAustralian politician
- John OsmersNew Zealand-born anti-apartheid activist and bishop
- John OsmondWelsh writer and journalist
- John OsogoKenyan educationist and historian
- John OsorioIngeniería Electrónica in Especialización en Gerencia de Proyectos from Universi, Bogota or Bogotá
- John OsoroB.Arch in Architecture from Jomo Kenyatta University of Agriculture and Technolo, Nairobi
- John Ossian DaviesWelsh Congregationalist minister and author (1851–1916)
- John OssowskiCanadian rower
- John OstalkiewiczAmerican politician
- John OstashekCanadian politician
- John OsteenAmerican pastor (1921-1999)
- John OstellAnglo-Canadian architect, surveyor and manufacturer
- John Ostenresistance fighter
- John OsterEnglish rugby league footballer
- John OsterBritish footballer (born 1978)
- John OstermanSwedish editor
- John OstranderAmerican comic book writer, known for Suicide Squad and The Spectre
- John OstromAmerican paleontologist (1928-2005)
- John OswaldBishop of Clonfert and Kilmacduagh; Bishop of Dromore; Bishop of Raphoe
- John OswaldSouth Australian politician (1939 - )
- John OswaldBritish Army officer
- John OswaldScottish footballer
- John OswaldScottish philosopher and revolutionary (c. 1760–1793)
- John OswaldCanadian composer
- John Oswald Mair Hunter, Lord HunterScottish advocate (1913–2006)
- John Oswald SandersNew Zealand lawyer
- John OswenEnglish printer (fl. 1548-1553)
- John OszajcaAmerican musician
- John Other DayDakota mediator
- John Otho ChapmanCanadian politician (1931–2011)
- John Otho Marsh, Jr.American politician from Virginia (1926-2019)
- John Otho PagetBritish writer
- John OtisAmerican politician, Maine (1801-1856)
- John Otis Barrows
- John Otis BrewAmerican archaeologist