Dictionaries, Thesauruses, Pictures, and Press Releases
- Ocampo-Friedmann, Roseli (1937–)
- Ochichi, Isabella (1979–)
- Ochoa, Elisa
- Ochoa, Ellen (1958–)
- Ochs, Debra (1966–)
- Ocloo, Esther (1919–2002)
- Octavia (39–62 CE)
- Octavia (c. 69–11 BCE)
- Oda (806–913)
- Oda (fl. 1000)
- Oda of Bavaria (fl. 890s)
- Oda of Germany and North Marck (fl. 900s)
- Oda of Lorraine (fl. mid-1000)
- Oda, Cheko
- Odaga, Asenath (1938–)
- Odaka, Emiko (1962–)
- Odaldi, Annalena (1572–1638)
- Oddon, Yvonne (1902–1982)
- Odebrecht, Viola (1983–)
- Oden, Elaina (1967–)