Authors that start with: "O"
- O. F. Mentzel
- O. Henry
- O. J. Mayo
- O. J. Simpson
- O. R. Melling
- O. T. Fagbenle
- O. T. Genasis
- O. Winston Link
- O'Neal Dozier
- O'Shea Jackson Jr.
- Oak Ridge Scientists
- Oakes Ames
- Obiageli Ezekwesili
- Obie Trice
- Octave Borelli
- Octave Chanute
- Octave Mirbeau
- Octavia E. Butler
- Octavia Spencer
- Octavian Paler
- Octavio Paz
- Oda Nobunaga
- Oded Fehr
- Odell Beckham Jr.
- Odette Annable
- Odeya Rush
- Odilon Redon
- Odion Ighalo
- Odo of Chatillon-Sur-Marne
- Ofer Kenig
- Office of Strategic Services
- Offset
- Ofra Haza
- Ofra Strauss
- Og Mandino
- Ogden Livingston Mills
- Ogden Nash
- Ohanus Appressian
- Ohio
- Ohio Ripley
- Ohio University Post
- Okieriete Onaodowan
- Okky Madasari
- Oklahoma
- Oksana Baiul
- Oksana Masters
- Okuma Shigenobu
- Olaf Tveitmoe
- Olafur Eliasson
- Olafur Ragnar Grimsson
- Olav Thon
- Old Tassel
- Oldradus de Ponte
- Ole Gunnar Solskjaer
- Oleg Cassini
- Oleg Deripaska
- Oleg Kulik
- Oleksandr Usyk
- Olene Walker
- Olesya Rulin
- Olga Fonda
- Olga Korbut
- Olga Kurylenko
- Olga Tokarczuk
- Olin Johnson
- Olin Miller
- Olisa Agbakoba
- Olive Schreiner
- Oliver Burke
- Oliver Cromwell
- Oliver De Lancey
- Oliver E. Williamson
- Oliver Ellsworth
- Oliver Evans
- Oliver Flanagan
- Oliver Franks
- Oliver Goldsmith
- Oliver Hardy
- Oliver Heaviside
- Oliver Herford
- Oliver Hudson
- Oliver Jackson-Cohen
- Oliver Joseph Lodge
- Oliver Kahn
- Oliver North
- Oliver Otis Howard
- Oliver P. Smith
- Oliver Perry Morton
- Oliver Platt
- Oliver Plunkett
- Oliver Reed
- Oliver Sacks
- Oliver St. John
- Oliver Stark
- Oliver Stone
- Oliver Sykes
- Oliver Tambo
- Oliver Wendell Holmes Jr.
- Oliver Wendell Holmes Sr.
- Oliver White
- Olivia Colman
- Olivia Cooke
- Olivia Culpo
- Olivia d'Abo
- Olivia de Havilland
- Olivia DeJonge
- Olivia Holt
- Olivia Hussey
- Olivia Munn
- Olivia Newton-John
- Olivia Thirlby
- Olivia Wilde
- Olivia Williams
- Olivier Dahan
- Olivier de Berranger
- Olivier Duhamel
- Olivier Giroud
- Olivier Martinez
- Olivier Megaton
- Olivier Messiaen
- Olivier Sarkozy
- Olivier Theyskens
- Olly Alexander
- Olly Murs
- Olof Palme
- Olu Falae
- Olufemi Taiwo
- Olusegun Obasanjo
- Olympe de Gouges
- Olympia Brown
- Olympia Dukakis
- Olympia Snowe
- Olympias
- Om Malik
- Om Puri
- Omar Abdirashid Ali Sharmarke
- Omar Ahmad
- Omar Al-Bashir
- Omar Amanat
- Omar Bagour
- Omar Benson Miller
- Omar Bongo
- Omar Dorsey
- Omar Encarnacion
- Omar Epps
- Omar Hassan Sadek Mahdi
- Omar Khayyam
- Omar N. Bradley
- Omar Saif Ghobash
- Omar Sharif
- Omar Sy
- Omar Torrijos Herrera
- Omari Hardwick
- Omarion
- Omarosa Manigault Newman
- Omer Bodson
- OMI
- Omid Djalili
- Omri Katz
- Oneohtrix Point Never
- Oona Chaplin
- Opal Tometi
- Operation Rescue
- Ophelia Lovibond
- Opium Investigating Committee
- Oprah Winfrey
- Oral Roberts
- Orange Ferriss
- Orde Wingate
- Ordericus Vitalis
- Oren Etzioni
- Oren Peli
- Oreste Baratieri
- Orestes Augustus Brownson
- Organization of Anti-Nazi German-Americans
- Organization of the Islamic Conference
- Orhan Pamuk
- Ori Gersht
- Oriana Fallaci
- Orianthi
- Origen
- Orin Kirshner
- Orin Krishner
- Orin Lehman
- Orison Swett Marden
- Orla Brady
- Orlando Aloysius Battista
- Orlando Bandinelli
- Orlando Bloom
- Orlando Brown
- Orlando Cepeda
- Orlando Gibbons
- Orlando J. Rodriguez
- Orlando Jones
- Ornella Muti
- Ornette Coleman
- Orrin Hatch
- Orsamus Cole
- Orson Bean
- Orson F. Whitney
- Orson Hyde
- Orson Pratt
- Orson Scott Card
- Orson Welles
- Orval E. Faubus
- Orville Hickman Browning
- Orville Hitchcock Platt
- Orville Redenbacher
- Orville Vernon Burton
- Orville Wright
- Ory Okolloh
- Os Guinness
- Osama bin Laden
- Osami Nagano
- Osbernus
- Osborn Elliott
- Osby Davis
- Oscar Adams
- Oscar Ameringer
- Oscar Arias
- Oscar Camilion
- Oscar De La Hoya
- Oscar de la Renta
- Oscar Fernandes
- Oscar Hammerstein
- Oscar Hijuelos
- Oscar Isaac
- Oscar Levant
- Oscar Munoz
- Oscar Niemeyer
- Oscar Nunez
- Oscar Peterson
- Oscar Pistorius
- Oscar Robertson
- Oscar Romero
- Oscar Taveras
- Oscar Wilde
- Oscar Wilder Underwood
- Osip Mandelstam
- Oskar Freysinger
- Oskar Hippe
- Oskar Kokoschka
- Oskar Lafontaine
- Oskar Schindler
- Oskar Werner
- Osman Baydemir
- Osman Rashid
- Osric Chau
- Ossie Davis
- Oswald Chambers
- Oswald Mosley
- Oswald Spengler
- Oswald Veblen
- Oszkar Jaszi
- Otanes
- Othello
- Othman Bin Affan
- Oti Mabuse
- Otis Blackwell
- Otis Bowen
- Otis Graham Jr.
- Otis Moss III
- Otis Moss Jr.
- Otis Redding
- Otis Rush
- Otis Singletary
- Otis Williams
- Ottar Svarte
- Ottessa Moshfegh
- Ottmar Hitzfeld
- Otto Bauer
- Otto Dix
- Otto Frank
- Otto Hahn
- Otto Heinrich Warburg
- Otto Hermann Kahn
- Otto Kerner Jr.
- Otto Kirchheimer
- Otto Lambsdorff
- Otto Lang
- Otto Lilienthal
- Otto Loewi
- Otto of Freising
- Otto Penzler
- Otto Perez Molina
- Otto Preminger
- Otto Rank
- Otto Ruhle
- Otto Schily
- Otto Skorzeny
- Otto von Bismarck
- Otto Wallach
- Otto Weininger
- Ouida
- Ousmane Dembele
- Ovadia Yosef
- Oveta Culp Hobby
- Ovid
- Ovide Mercredi
- Owain Glendower
- Owain Yeoman
- Owen Arthur
- Owen Barfield
- Owen Benjamin
- Owen Chamberlain
- Owen D. Young
- Owen Dudley Edwards
- Owen Farrell
- Owen Feltham
- Owen Hart
- Owen King
- Owen Lattimore
- Owen M. Fiss
- Owen Paterson
- Owen Wilson
- Owen Wister
- Oxana Chusovitina
- Oxford English Dictionary
- Oxford Laws of War on Land Convention
- Ozuna
- Ozwald Boateng
- Ozzie Guillen
- Ozzie Knezovich
- Ozzie Smith
- Ozzy Osbourne
