| O'Keefe | Onacro, Vauw | Orgon |
| Ochlemech | Onandere, Alea | Orisiff |
| Of-1 | Onéré, Kouri | Orlgans |
| Oghol | Ongelsken | Orrak |
| Ogil | Onklantson | Orsons, Mildred |
| Ogneman, Aralf | Onot | Ortokur, Powlor |
| Ohna Najahr | Ooff | Osega, Roger |
| Okarwen | Oogh at Tarkan | Ostal, Clyde |
| Okika | Oomph Amber | Ostrum |
| Okoor | Opan, Okunan | Ôtech |
| Okura, Son | Opinzom, Grohaam | Otharvar Ris Bhran |
| Ol On Nogon | Oppouthand, Moustique | Ottarsk |
| Olek, Camaron | Opprus, Coden | Ovaron |
| Olivier, Sunchex | Or Mendin | Overbeck, Robert Cecil |
| Olkring | Oracle de Krandhor | Overmile, Wallen |
| Olkyra | Orban | Oycka, Tanya |
| Ologon, Véthussar | Orbanaschol III | O’Day |
| Oltruun, Vleeny | Orcast XXI | O’Loon, Mandry |
| Olukh | Ordoban | O’Marn, Lars |
| Olw | Orghon |
| Ombrilla, Jack | Orghoriet |
