- O'Grady Justin
- Obafemi Olufemi
- Obam Mekanda Franck-Martin
- Obiekea Celestina
- Obong Abasi Ene
- Ocama Ponsiano
- Ochola Stephen
- Ochola-Oyier Lynette
- Ochwoto M.
- Oderinde Bamidele
- Odewale Ebenezer
- Odia Ikponmwosa
- Odoom John
- Odugbemi Moyinoluwa
- Ofori-Boadu L.
- Ofula Victor
- Ogah Onwe
- Ogunbayo Emmanuel
- Ogungbangbe Julius
- Ogunsanya Olusola
- Oguntope Sobajo
- Ojo Olajumoke
- Ojok Lul Deng
- Okandze Antoine
- Okeyo Mary
- Okeyo Seth
- Okoi Catherine
- Okokhere Peter
- Okoli Leona
- Okolie Johnson
- Okomo Marie Claire
- Okomo Marie-Claire Assoumou
- Okwuraiwe Azuka Patrick
- Olabisi Olabisi
- Olawoye Idowu
- Olfert L.
- Oliver-Commey Joseph
- Ollomo Benjamin
- Olorunnimbe Subomi
- Olson David M
- Olubayo Luicer
- Olubusuyi Adewunmi
- Oludayo Ope-Ewe
- Oludele J.
- Oluniyi Paul
- Oluwapelumi Adeyemi
- Oluwasemowo Olukunke
- Omam Deborah
- Omar S.
- Omgba Vincent
- Omilabu S.
- Omoruyi Chukwuma
- Omunakwe Hannah
- Omuoyo Donwilliams
- Omuseni Esther
- Ondo Georgelin Nguema
- Ondoa Pascale
- Ongera E.
- Ong’era Edidah
- Oni Grace
- Onikepe Folarin
- Onwuamah C.K.
- Onwuamah Chika
- Onywera Harris
- Opanda Silvanos Mukunzi
- Ope-Ewe O.
- Oprisan Gabriela
- Orelle Arnaud
- Orne-Gliemann Joanna
- Orne-Gliemann Joanna
- Orsini Emanuele
- Osei-Wusu Israel
- Osiany Shebbar
- Osman Ikram Omar
- Ospanova Akerke
- Ossomba Joachim
- Otam Laure
- Oteng F.
- Otieno Edward
- Otuonye Ngozi Mirabel
- Ouadghiri Mouna
- Ouadghiri Ouna
- Ouangole Garba
- Ouangraoua Soumeya
- Ouapi Diane
- Ouattara Blaise
- Ouedraogo Abdoul Salam
- Ouedraogo Abdoul-Salam
- Ouedraogo Abdoul-Salam
- Ouedraogo Léopold
- Ouedraogo Saïdou
- Ouffoué Kra
- Ouk Vara
- Oukem-Boyer Odile Ouwe Missi
- Ouma Ahmed
- Oumzil Hicham
- Ouro-Medeli Alassane
- Ousmane Faye
- Ouso Daniel
- Ouédraogo Jean Bosco
- Ouédraogo Jean-Bosco
- Owaka Samwel
- Owen Rhonda
- Owusu Michael
- Owusu Michael
- Owusu-Nyantakyi C.
- Oyedele Awoyinka Dada
- Oyefolu A.
- Oyofo Buhari A.
- Oyola Samuel
- Ozer Egon
- O’grady Justin