Ohls - Pain
- Ohlsen, Peter
- Ohnishi, Yosuke
- Ohr, George E.
- Okamura, Arthur
- Okawa, Tatsuji
- Oki, Shouji
- Oksana
- Okubo, Oshikunii
- Okutsu, Naomichi
- Okzan, Tayyor
- Olaf
- Oldeboerrigter, Melle Johannes
- Oldenburg, Claes
- Oldham, Frank
- Olesen, Henrik
- Oleszko, Pat
- Oliveira, Leandro
- Oliver, Richard
- Oliver; aka Bowser
- Olivia
- Olivie, Albert
- Olmstead, Mayo
- Olson, Ben
- Oltos
- Omaha
- Omolade, Kip
- Omphale, Chris
- Onanies, Teikoku
- Onesimos
- Oni
- Onyx
- Ookurano, Aki
- Opanasenko, Oksana
- Opie, Stephanie
- Opitz, Georg Emanuel
- Opiz, Georg Emanuel
- Oppenheim, Meret
- Oppi, Ubaldo
- Orazi, Manuel
- Orbik, Glen
