Auteurs, beginnend met de letter O
| Auteur | Aantal Citaten |
| Oscar Wilde | 54 |
| Hugo Olaerts | 40 |
| Otto Weiss | 31 |
| Olaf Hoenson | 17 |
| Orlando Aloysius Battista | 7 |
| Robert Orben | 6 |
| Ortega y Gasset | 4 |
| Oprah Winfrey | 3 |
| Orson Welles | 3 |
| Oswald Avery | 2 |
| Octave Feuillet | 2 |
| O M | 2 |
| Wiel Oehlen | 2 |
| Olav Palme | 2 |
| Otto von Bismarck | 2 |
| Jan Willem Overeem | 2 |
| Publius Ovidius | 2 |
| Axel Oxenstierna | 2 |
| O A | 1 |
| O B | 1 |