- Oliveri Paola
- Olivette Lisa
- Olivier Come
- Olivier Come
- Ollivier Sébastien
- Ollivier S.
- Ollmann Zoltan
- Omezzine Asma
- Omri Aymen
- Omri Moahamed Nazih
- Ongwen Nicholas
- Ongwen Nicholas O
- Onori F.
- Opiela Kamil
- Oral Imran
- Ordonez-Miranda Jose
- Orelli Paiva Guilherme
- Orias Frédéric
- Ostash Orest
- Osten Wolfgang
- Ostiguy P.-C