- Oakey Helena
- Obellianne Maïté M.
- Obel Nicolai
- Obonyo Dennis Ndolo
- Obri Arnaud
- O'Brien Martin
- Ochatt Sergio
- Ochatt Sergio
- O’connell Richard
- O'Connell Richard
- O'Connell Richard
- Oddo Salvatore
- O'Donnell Anthony A.
- O'Donohue Michael
- O’donovan Tracey
- Oehme Ina
- Oelmüller Ralf
- Oelmüller Ralf
- Ofner Itai
- Ogawa Michinaga
- Ogé Laurent
- Ogé Laurent L.
- Oge L.
- Oger Laurent
- Oghina-Pavie Cristiana
- Ogier-Denis Eric
- Ogmundsdottir Margret
- Ogretmen Besim
- Ohama Takashi
- Ohashi Yohei
- Oh Goo Taeg
- Oh Jaesung
- Oh Jaesung J.
- Ohkama-Ohtsu Naoko
- Ohlrogge John
- Ohmuraya Masaki
- Ohno Caroline
- Oh Seon-Hee
- Ohsumi Yoshinori
- Ohsumi Yoshinori
- Ohta K.
- Oh Young
- Oikawa Kazusato
- Oikonomou Vasileios
- Ojha Rani
- Okamoto Koji
- Okamoto Masanori
- Okazaki Shin
- Okazawa Hitoshi
- Oku Masahide
- Olaru Irina
- Olas Justyna Jadwiga
- Olate Ema
- Olatunji Damilola
- Oldroyd Giles E D
- O’leary Seónadh
- Oliván Sara
- Oliveira Correia Lydie
- Oliveira Jorge
- Oliver Cecilia
- Oliver Melvin J.
- Oliver-Salvador María
- Olivier Nicolas
- Olivier Nicolas
- Ollivier Laurence
- Ollivier Rémi
- Ollmann Michael
- Olsen Carl Erik
- Olsen Jeppe
- Olsen Jógvan Magnus H
- Olzmann James
- Omari Shakib
- Omary M. Bishr
- Omrane Selim
- Ondrej Martin
- Ong Sang-Bing
- Ong Sang-Ging
- Onnis Anna
- Oparka Karl
- Ophélie Kot
- Opsomer Alisson
- Orban-Nemeth Zsuzsanna
- Orduna Izamar Olivas
- Orellana Ariel
- Orellana Juan
- Orellana-Muñoz Sara
- Orgeur G.
- Oria Nicolas N.
- Ori Naomi
- Orlov Yuriy L.
- O’rourke Eyleen
- Orsel Mathilde
- Ortega-Villaizan Maria del Mar
- Ortigosa Francisco
- Ortíz-Atienza Ana
- Ortiz-García Paloma
- Ortiz-Gonzalez Xilma
- Ortmannová Jitka
- Ortona Elena
- Oshima Kenshiro
- Osiewacz Heinz
- Osman Abdel-Hamid
- Osman Kim
- Osorio Sonia
- Osta Rosario
- Osted Anders
- Ostersetzer-Biran Oren
- Ostos Garrido Francisco J.
- Ostrander Elise Adrian
- O’sullivan Mary
- O’sullivan Timothy
- Otadoh Jane
- Otala Marjut
- Otani Masahiko
- Otegui Marisa
- Otegui Marisa S.
- Otsu Kinya
- Ott Christiane
- Ott Felix F.
- Ottobrini Luisa
- Ouadah Sarah
- Ouaini Naim
- Ouaini Naïm
- Ouaïni Naïm
- Ouaini Naim N.
- Ouali Christian
- Ouazzani Jamal
- Ouddah Ayoub
- Ouddah Ayoub
- Ouellet Mario
- Oughou Mohamed
- Oughou Mohamed Said
- Ouibrahim Laurence
- Ou Jing-Hsiung James
- Oulame Mouandhoime Z.
- Ouni Emna
- Ourliac Benjamin
- Ournay. Virginie T
- Ourry Alain A.
- Outeiro Tiago
- Oyen Diane
- Oynebraten Inger
- Ozturk Melek