- Oakeshott John
- Oberto Anaïs
- Ochsenbein F.
- O'Donnell Charles W
- O’donoghue Sean
- Ogawa Mizuhito
- Ohlmann Théophile
- O’hora Denis
- Ohrhallinger Stefan
- Ohue Masahito
- Olama Mohammad
- Olarte Carlos
- Olarte Carlos
- Olarte Carlos
- Oleon Émile
- Oliveira Tiago
- Oliveira Tiago
- Oliveras Albert
- Oliver Carlos G
- Oliveto Pietro
- Olivetti Nicola
- Olivetti Nicola
- Olivier Pauline
- Ollivier François
- Olszanecki Barth Jacson Miguel
- Omidvar Giti
- Omidvar-Tehrani Behrooz
- Onete Cristina
- Onete Cristina
- Ongeri Fiona
- Opitz Thomas
- Oppermann Steffen
- Opuu Vaitea
- Orden David
- Osorio Angel
- Ospici Matthieu
- Ospina Raydonal
- Ostromoukhov Victor
- Otmani Ayoub
- Ouaknine Joël
- Ouangraoua Aïda
- Ouazzani Sabrina
- Oudeyer Pierre-Yves
- Oudinet Johan
- Oudot Steve
- Oudot Steve Y.
- Ouedraogo Wendlasida
- Ouedraogo Wendlasida
- Ouedraogo Wendlasida
- Oustry Antoine
- Oustry Antoine
- Oustry Antoine
- Oustry Antoine
- Ouvrard Paul
- Ouwehand W.
- Ovadi Judit
- Ovali Sefik Kerem
- Ovchinnikov Alexey
- Ovchinnikov Alexey
- Ovsjanikov Maks
- Ovsjanikov Maks
- Ovsjanikov Maks
- Ovsjanikov Maks
- Ovsjanikov M
- Ozbek Pemra