- Ovarlez Jean-Philippe
- Ozturk Onur
- Ott Laurent
- Oudompheng Benoit
- Orive-Miguel David
- Ouedraogo Wendyam S. B.
- O'Brien Gareth
- Orovic Irena
- Oshiro Zardo Gabriel
- Oudompheng Benoit
- Ojeda David
- Ollander Simon
- Olympieff Serge
- Ostaschenko Ekaterina
- Osán Tristan Martín
- Oudot Steve Y.
- Ouedraogo Wendyam Serge Boris