Gary O: Gary O'Connor (Canadian singer)
Annie Oakley: Phoebe Anne Oakley Mozee (sharpshooter)
Constance O'Banyon: Evelyn Gee (author)
Merle Oberon: Estelle Merle O'Brien Thompson (Indian movie actress, b1911 d1979)
Hugh O'Brian: Hugh J. Krampke (tv actor, b1925)
Dee O'Brien: Marion Zimmer Bradley (author)
E.G. O'Brien: Arthur C. Clarke (author)
Margaret O'Brien: Angela Maxine O'Brien (movie actress)
Saliee O'Brien: Frankie Lee Janas (author)
Billy Ocean: Leslie Sebastian Charles (Trinidadian rhythm & blues singer/songwriter, b1950)
Lucky Oceans: Reuben Gosfield (country musician - 'Asleep At the Wheel')
Frank O'Connor: Michael John O'Donovan (Irish author/co-director of the Abbey Theatre 1935-39, b1903 d1966)
Anita O'Day: Anita Belle Colton (jazz singer)
Odetta: Odetta Holmes (folksinger/actress)
Cathy O'Donnell: Ann Steely (movie actress, b1925 d1970)
K.M. O'Donnell: Barry N. Malzberg (author)
Lawrence O'Donnell: C.L. Moore (writer)
Rosie O'Donnell: Roseann O'Donnell (comedian/movie actress/tv talk show host, b1962)
Finn O'Donnevan: Robert Sheckley (author)
Sean O'Faolain: John Whelan (Irish short story author, b1900 d1991)
Jennifer O'Green: Jennifer Roberson (writer)
Sheila O'Hallion: Sheila Allen (author)
Elizabeth O'Hara: Eilis Dhuibhne (author of adult & children's books/poet)
Frank O'Hara: Francis Russell (poet)
John O'Hara: Jesus Franco (writer)
Maureen O'Hara: Maureen Fitzsimmons (movie & stage actress, b1920)
Dennis O'Keefe: Edward Bud Vance Flanagan (vaudvillian/movie & tv actor/movie director/writer)
Olaf I: Olaf Tryggvesson (King of Norway, 995-1000)
Warner Oland: Johan Verner Olund [aka Werner Ohlund] (inscrutable Swedish actor/Chinese sleuth, b1879 d1938)
Ol' Dirty Bastard: Russell Tyrone Jones [aka Bib Baby Jesus, ODB] (Wu-Tang Clan rapper/felon, b1969)
Old Yeller: Spike (Labrador Retriever who starred in the film of the same name)
Barney Oldfield: Bernard Eli Oldfield (motorcycle/racecar driver)
* Gary Oldman: Leonard Gary Oldman (movie & tv actor, b1958)
Mrs. O'Leary: Catherine O'Leary (famous Chicago cow-keeper)
Mrs. O'Leary's cow: Daisy [aka Madeline, Gwendolyn] (infamous alleged Chicago fire-starter)
Olga: Olga Kvitko (fashion designer)
B.J. Oliphant: Sheri S. Tepper (author)
Tony Oliva: Pedro Lopez (Cuban professional baseball player/3-time American League batting champion, b1940)
Oliver: William Oliver Swofford (singer, known for 60's "Good Morning Starshine")
Edna May Oliver: Edna May Nutter (movie actress, b1883 d1942)
King Oliver: Joseph Oliver [aka Papa Joe] (bandleader/jazz cornetist/composer/teacher to Louis Armstrong, b1885 d1938)
Patricia Oliver: Patricia de la Fuente (author)
Tess Oliver: Terry Shapiro Kovac (author)
Mrs. Olsen: Virginia Christine (tv commercial spokesperson for Folger's Coffee, b1920 d1996)
Ole Olsen: John Sigvard Olsen [of comedy team of Olsen & Johnson] (comedian/vaudvillian/movie actor)
Sara Jane Olson: Kathleen Soliah (1970's Symbionese Liberation Army radical/bankrobber-turned-Minnesota housewife/actress, b1946)
J. Pat O'Malley: James Patrick O'Malley (tv actor)
Omar: 'Umar (2nd Muslim caliph, 634-644, who introduced chanting)
* Nelly Omar: Nilda Elvira Vattuone (Argentinian movie actress, b1911)
Omega: Ray Bradbury (sci-fi author, b1920) {used this NdG in 'Futuria Fantasia' in the Winter of 1940}
Dagmar Onassis: John Kelly (female impersonator/drag queen/singer)
Jacqueline Onassis: Jacqueline Lee Bouvier Kennedy (former U.S. First Lady/magazine editor/cultural icon, b1929 d1994)
Ondar: Kongar-ol Ondar (Tuvan throat singer, b1962)
One-Armed Man: Fred Johnson (ficticious murderer of Mrs. Richard Kimble)
Reagan O'Neal: James O. Rigney, Jr. (author)
Ryan O'Neal: Patrick Ryan O'Neal (movie & tv actor, b1941)
Tip O'Neill: James O'Neill (Canadian-born baseball player/umpire)
Tip O'Neill: Thomas P. O'Neill, Jr. (politician/former Speaker of the U.S. House of Representatives, b1912 d1994)
Carrie Onn: Robert E. Vardeman (author)
Max Ophuls: Max Oppenheimer (movie director)
* Opie: Greg Hughes (half of the Opie & Anthony radio shock-jock team fired in Boston for falsely announcing mayor's death on 4/1/98, then fired in NYC for providing live color commentary of a couple having sex in St.Patrick's Cathedral)
Phiber Optik: Mark Abene (leader of the Masters of Deception telephone hacker gang, b1972)
Baroness Orczy: Mrs. Montague Barstow (author)
A.J. Orde: Sheri S. Tepper (writer)
Jackson O'Reilly: James O. Rigney, Jr. (author)
Glennda Orgasm: Glenn Belverio (New York City drag queen/singer/movie actress)
Origen: Origenes Adamantius (Christian theologian & teacher)
Tony Orlando: Michael Anthony Orlando Cassavitis (pop singer/variety show host)
Eugene Ormandy: Jeno Blau (conductor of the Philadelphia Philharmonic Orchestra for over 40 yeaqrs!)
P.J. O'Rourke: Patrick Jake O'Rourke (humorist/columnist/road rallyist, b1947)
Orphan Ann: Iva Ikuko Toguri d'Aquino (WWII radio propagandist for the Japanese, b1916)
George Orwell: Eric Arthur Blair (Indian-born British novelist/essayist/futurist, b1903 d1950)
Super Dave Osborne: Bob Einstein (writer/actor/clumsy stuntman/brother of Albert Brooks)
Ozzy Osbourne: John Michael Osbourne (English heavy-metal singer/songwriter, b1948)
Oscar: Rollin Sullivan [of the Grand Ole Opry comedy team of Lonzo & Oscar] (country entertainer/comedian/musician, b1919)
Osceola: Baroness Karen Christence Dinesen Blixen-Finecke (Danish writer of short stories)
Lee Oskar: Oskar Levrtin Hansen (Danish harmonica player)
K.T. Oslin: Kay Toinette Oslin (country western singer/songwriter/pianist, b1942?)
Marie Osmond: Olive Osmond (singer)
Osorkon I: Sekhemkheperre-setepenre (2nd pharaoh of the 22nd Dynasty of Egypt, 924-909BC)
Osorkon II: Usermare-setepenamun (5th pharaoh of the 22nd Dynasty of Egypt, 883-855BC)
Osorkon IV: Akheperre-setepenamun (10th pharaoh of the 22nd Dynasty of Egypt, 735-712BC)
Othman: 'Uthman (3rd Muslim caliph, 644-656)
Ouida: Marie Louise De La Ramee' (English romantic novelist, b1839 d1908) {NdP is a childhood version of her middle name}
Our Town: Grover's Corners, New Hampshire (fictional site of the classic Thornton Wilder play)
'Outer Limits' voice: Vic Perrin (actor/announcer/narrator/guy who controls the horizontal & the vertical on your tv set, b1916 d1989)
Ovid: Publius Ovidius Naso (Roman poet and expert on love)
Philip Owen: Judson Phillips (author)
Wilfred Owen: Edward Salter (poet)
Eddie Owens: Eddie Abram (American boxer)
Jesse Owens: James Cleveland Owens (Olympic track & field athlete)
Shirley Owens: Shirley Alston (lead rhythm & blues singer with 'The Shirelles', b1941)
Frank Oz: Frank Richard Oznowicz (English puppeteer/actor/director/producer, b1944)
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