- Obeid Bachar
- Obrien Thomas
- O'Brien Thomas
- Odeon Hugues
- Odie Lionel
- Ogilvie Scott
- Ohana Mickaël
- Oh Hong Lye
- Ohta Nozomu
- Okada Takeshi
- O'Keefe Kyle
- Olandoski Guilherme
- Olarte-Bacares Carlos
- Olde Kalter Marie José
- Oliete Ana
- Oliveira dos Santos Joao Miguel
- Oliveira Renata
- Oliveira Renata Lúcia Magalhães De
- Olivier Chiello
- Ostolaza Javier
- Otaegui Oihana
- Ota M.
- Ouattara-Brigaudet Mathilde
- Oudiette Delphine
- Oudshoorn M.
- Oueslati Walid
- Ouimet Marie Claude
- Oukhellou Latifa
- Ould Bouamama Belkacem
- Ould Moctar Hassan
- Oulid-Azouz Noureddine
- Outbib Rachid
- Ovalle Andres
- Ovando-Tellez Marcela
- Oviedo-Trespalacios Oscar
- Ozkalp-Poincloux Barbara