Authors: O
- Odunlade Adekolaborn 1976 · 2 quotes
- Officer Woosborn 1996 · 2 quotes
- Offsetborn 1991 · 6 quotes
- Og Mandino1923–1996 · 16 quotes
- Ogaga Ifowodob. 1966 · 2 quotes
- Ogbeide Ifaluyi-Isibor1 quotes
- Ogden Nash1902–1971 · 87 quotes
- Ogden Rood1831–1902 · 1 quotes
- Oge Okoyeborn 1980 · 4 quotes
- Ogechi Adeola9 quotes
- Ogechukwukanma Ogwoborn 1968 · 2 quotes
- Oghenechovwe Donald Ekpeki2 quotes
- Ogom Chijinduborn 1985 · 3 quotes
- Ogonna Chukwudiborn 1988 · 2 quotes
- Ogutu Okudob. 1992 · 10 quotes
- Ohemaa Adjei Andoh1 quotes
- Ojy Okpeborn 1981 · 3 quotes
- Okakura Kakuzō1862–1913 · 5 quotes
- Okechukwu Ezea1963–2025 · 2 quotes
- Okechukwu Ikejianid. 2007 · 4 quotes
- Okey Bakassiborn 1969 · 5 quotes
- Okey Ndibeborn 1960 · 9 quotes
- Okezie Victor ikpeazub. 1964 · 3 quotes
- Okieriete Onaodowanborn 1978 · 1 quotes
- Okmalumkoolkatborn 1983 · 3 quotes
- Okot p'Bitek1931–1982 · 24 quotes
- Oksana Mukhaborn 1964 · 14 quotes
- Oksana Shachko1987–2018 · 4 quotes
- Oksana Zabuzhkoborn 1960 · 5 quotes
- Okuhle Celeborn 1997 · 4 quotes
- Okwiri Oduorborn 1980 · 2 quotes
- Okwudili Nebeolisab. 1993 · 2 quotes
- Ol' Dirty Bastard1968–2004 · 5 quotes
- Ola Ainaborn 1996 · 3 quotes
- Ola Brownborn 1986 · 8 quotes
- Ola El Aguizyborn 1948 · 2 quotes
- Ola Opesanborn 1966 · 1 quotes
- Ola Rotimi1938–2000 · 34 quotes
- Olabisi Ugbeborborn 1951 · 7 quotes
- Olabiyi Babalola Yai1939–2020 · 5 quotes
- Oladapo Afolabi6 quotes
- Oladapo Ashiru13 quotes
- Oladeinde Josephborn 1948 · 1 quotes
- Oladejo Okediji1929–2019 · 2 quotes
- Oladiwura Oladepoborn 1991 · 3 quotes
- Olaf Scholzborn 1958 · 10 quotes
- Olaf Stapledon1886–1950 · 59 quotes
- Olaide Olaogunborn 1986 · 10 quotes
- Olaitan Soyannwo5 quotes
- Olajide Ipinsagbaborn 1964 · 7 quotes
- Olajumoke Adenowoborn 1968 · 21 quotes
- Olajumoke Orisagunaborn 1989 · 2 quotes
- Olajumoke Yacob-Haliso2 quotes
- Olakunle Soriyan4 quotes
- Olalekan Adeeko7 quotes
- Olalekan Olude6 quotes
- Olamideborn 1989 · 3 quotes
- Olanike Adeyemoborn 1970 · 6 quotes
- Olanike Kudirat Adeyemoborn 1970 · 2 quotes
- Olanike Olugboji-Daramolab. 1974 · 8 quotes