- Obaidellah Unaizah
- Ocampo-Martinez Carlos
- Ochatt Sergio
- Ochatt Sergio
- O'Donnell Lauren J.
- O'Donnell Lauren J
- Oehlberg Lora
- Oehlberg Lora
- Oehlberg Lora
- Ohannessian Mesrob
- Ohlinger Daniel
- Ohlmann Théophile
- Ohzeki Masayuki
- Okuya Yujiro
- Okuya Yujiro
- Olarte Carlos
- Olarte Carlos
- Olarte Carlos
- Olaru Sorin
- Olaso R.