- Obaton M
- Oberson Astrid
- O. Caldiz Daniel
- Ocaña Antonio
- Ochshepkov Sergey
- O'Connell Anthony
- Odile Vouillot Marie
- O'Gara F
- Ogawa Kenta
- Oger Madeleine
- Ogilvy Susan
- Ogiwara S
- Ogle Stephen
- O. Guerif Martine
- Oihabi Abdallah
- Okeke B
- Okon Yaacov
- Olioso Albert
- Olivain Chantal
- Oliveira Ja
- Oliveira José
- Olivella C