- O'Brien Stephen
- O'Donnell Vivian
- O'Mahony Rebecca
- O'Riordan Lisa
- O'Rourke Michele
- O'Shea Helen
- O. Gilbert Robert
- O. Nwosu Chukwunyere
- Oakley Brian B.
- Obal Gonzalo
- Obando Marrero Elsa
- Obradovic Milan R.
- Ocaña-Macchi Manuela
- Ocepek Matjaz
- Ochoa-Repáraz Javier
- Odama Lillian
- Odugbo Moses
- Oem Jae-Ku
- Oertli Ernest H.
- Oestmann Angelina
- Oevermann Anna
- Oger Aurélie
- Ognik Katarzyna
- Ogugo Moses
- Ogura Yoshitoshi
- Oh Dayoung
- Oh Sungtaek
- Ohashi Kazuhiko
- Ohashi Seiichi
- Ohlinger Vf
- Ohno Koichi
- Oidtmann Birgit
- Ojha Shivani
- Okada Hiroyuki
- Okada Hiroyuki
- Okagawa Tomohiro
- Okello Emmanuel
- Okoth Edward
- Okura Masatoshi
- Olaleye Od
- Olesen Niels Jørgen
- Olesen Niels Jørgen
- Olesen Nj
- Olindo Assis Martins Filho
- Oliveira Celso Jb
- Oliveira Rodrigo
- Oliveira Sergio
- Oliveira Simone
- Oliveira Sérgio Costa
- Oliver Stephen P.
- Oliver-Ferrando Salvador
- Olivera Valeria
- Olivier Fabrice
- Olivier M.
- Olivier M
- Olivier Michel
- Ollivett Theresa L
- Olmeda Sonia
- Olsaker Ingrid
- Olsen Anne Berit
- Olsen Christel Moræus
- Olsen Christel Moræus
- Olsen Ingrid
- Olsen John Elmerdahl
- Olsen Line
- Olsen Rikke H.
- Olsen Rikke Heidemann
- Oltenacu Pa
- Olveira José G.
- Olveira José G.
- Olvera Alex
- Olvera Alexandre
- Omar Bennoune
- Omar Mohammed Husnni
- Ondrackova Petra
- Onishi Takafumi
- Onrust Lonneke
- Onyango Maria G
- Onyebuchi Igbokwe Ikechukwu
- Ooi Hong-Kean
- Op de Beeck A
- Opriessnig Tanja
- Opriessnig Tanja
- Opriessnig Tanja
- Opsomer Geert
- Orand Jean-Pierre
- Orden José A.
- Oreshkova Sf
- Orge Leonor
- Orge Leonor
- Origgi Francesco C.
- Orlandi Patricia P.
- Ornbjerg Niel
- Orozco Marcela M
- Orsel Karin
- Orsel Karin
- Orsel Karin
- Orsini Gianluca
- Ortega C
- Ortega Joaquín
- Ortega-Mora Luis M.
- Ortega-Mora Luis Miguel
- Ortega-Mora Luis Miguel
- Ortega-Mora Luis Miguel
- Ortega-Mora Luis
- Ortego Javier
- Ortiz Daniela
- Ortiz Katia
- Ortiz-Delgado Juan B.
- Ortiz-Díez Gustavo
- Ortiz-Peláez Angel
- Orton Richard J.
- Osaki Makoto
- Osawa Aya
- Oschilewski Anna
- Osdoit Claire
- Osoro Koldo
- Osoro Koldo
- Ossent Peter
- Osso Montsant
- Osta R
- Oster Michael
- Osterhaus Adme
- Osterhaus Albert D. M. E.
- Osterhaus Albert Dme
- Osterrieder Nikolaus
- Oswald E.
- Oswald E
- Oswald Eric
- Oswald Isabelle P.
- Ota Atsushi
- Otake Satoshi
- Ott I
- Otte Joachim
- Otten Henny G
- Ou Xumin
- Ou Xuming
- Ouhida Soraya
- Oukessou M
- Ould-Amrouche Abderrahmane
- Oury B
- Ouyang Kang
- Ouzrout R
- Owczarek Katarzyna
- Owen Jonathan P
- Ozden Simona
- O’donnell Lindsay
- O’kennedy Martha M.
- O’riley Kim
- O′keeffe James