- O'Farrell Shay
- O'Leary Jennifer
- Oberhansli François
- Oberst J.
- Obhodas Jasmina
- Obota Clay
- Obura D
- Obura David
- Octave Picot
- Oddie Melissa
- Ody Denis
- Oedin Malik
- Oh Baek-Lok
- Ohayon Catherine
- Ohe Yasuo
- Oheix Jocelyne
- Ojaveer Henn
- Ojea Elena
- Okhee Kim
- Okura Retsu
- Olatunji O.J.
- Olatunji Opeyemi Joshua
- Olinet Maud
- Oliveira Pedro H
- Oliveira Raul
- Olivier D.
- Olivier Damien
- Oliviero Fabiana
- Ollier C
- Ollier Corinne
- Olsen Steffen M.
- Omolade Dada
- Omrane Abdennebi
- Orange Sébastien
- Orempuller Joel
- Ortega Pascal
- Ortiz Juan-Carlos
- Ory David
- Osborn David
- Oschlisniok Janusz
- Osenberg C. W
- Osenberg Craig W
- Osinga Ronald
- Osuka Kennedy
- Otake Tsuguo
- Otcenasek Yann
- Othmani Ahlem
- Otjacques Eve
- Otsuka Fumiyuki
- Ottaviani Alexandre
- Ouellette Gilman
- Ouillon Sylvain
- Ouisse Vincent
- Oulé Jean-Claude
- Ourselin S.
- Ourselin Sebastien
- Ourselin Sébastien
- Oury Nicolas
- Oury Nicolas
- Ouédraogo Dakis-Yaoba
- Owsley Cynthia
- Oyono R.
- Oyono Roger
- Oyono Roger
- Oziel Laurent
- O’brien Duncan A
- O’donnell J. L.
- O’shea Owen