Authors
| Name | First name | Last name |
|---|---|---|
| Henry Nyongesa | Henry | Nyongesa |
| R. O'Callaghan | R. | O'Callaghan |
| Brendon O'Connor | Brendon | O'Connor |
| Ogbeide O. | Ogbeide | O. |
| Ibrahim Obeidat | Ibrahim | Obeidat |
| Ala Obeidat | Ala | Obeidat |
| Sam Obeng-Dompreh | Sam | Obeng-Dompreh |
| Fabian Obermann | Fabian | Obermann |
| Fabian Obermann | Fabian | Obermann |
| Olivia Obtinario | Olivia | Obtinario |
| Metin Ocak | Metin | Ocak |
| W. Ocha | W. | Ocha |
| Valentyna Ocheretna | Valentyna | Ocheretna |
| Amarulla Octavian | Amarulla | Octavian |
| Elena Odarushchenko | Elena | Odarushchenko |
| Oleg Odarushchenko | Oleg | Odarushchenko |
| Valentina Odarushchenko | Valentina | Odarushchenko |
| Nwankwo Odi | Nwankwo | Odi |
| Gloria Odiaga | Gloria | Odiaga |
| Sesan Odunuga | Sesan | Odunuga |
| Simon Ofner | Simon | Ofner |
| Felix Ofori | Felix | Ofori |
| Alyona Oftedahl | Alyona | Oftedahl |
| Sarah Ogar | Sarah | Ogar |
| Justine Ogborigbo | Justine | Ogborigbo |
| Adolf Ogi | Adolf | Ogi |
| Mihajlo Ogrizović | Mihajlo | Ogrizović |
| M.N. Ogun | M.N. | Ogun |
| Naoki Ohshima | Naoki | Ohshima |
| Fotis Oikonomou | Fotis | Oikonomou |
| Teemu Oivo | Teemu | Oivo |
| Lauri Ojala | Lauri | Ojala |
| Deo Ojha | Deo | Ojha |
| Bright Ojo | Bright | Ojo |
| Maureen Okafor | Maureen | Okafor |
| Hiroyuki Okazaki | Hiroyuki | Okazaki |
| Chukwuekem Okeke | Chukwuekem | Okeke |
| Joy Okeke-Ezeanyanwu | Joy | Okeke-Ezeanyanwu |
| Nkiru Okolo | Nkiru | Okolo |
| Abraham Okomanyi | Abraham | Okomanyi |
| Enoch Okon | Enoch | Okon |
| Mary Okonkwo | Mary | Okonkwo |
| Riskey Oktavian | Riskey | Oktavian |
| Angela Okuku | Angela | Okuku |
| Anayo Okwor | Anayo | Okwor |
| Theresa Okwumabua | Theresa | Okwumabua |
| Martha Olcott | Martha | Olcott |
| Eli Olinick | Eli | Olinick |
| Sandra Olivares-Bautista | Sandra | Olivares-Bautista |
| José Oliveira | José | Oliveira |