- O’Brian, Patrick
- O’Brien, Caragh
- O’Brien, Hannah
- O’Dell, Tawni
- O’Hara, Kate
- Oelker, Petra
- Oetker, Alexander
- Ohlerich, Dirk
- Ohlandt, Nina
- Ohlsson, Kristina
- Ohms, Daniela
- Okorafor, Nnedi
- Oliver, Lily
- Olsberg, Karl
- Olsen, Mila
- Orgel, T. S.
- Osborn, Patrick
- Osborne, Lawrence
- Österdahl, Martin
- Owen, Margaret
- Owens, Delia
- Oswald, James
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