| Author | Publications | Articles |
|---|
 O'Brien, Fergal | 1 | 1 |
| O'Brien, Ivan | 1 | 0 |
| O'Brien, Michael | 7 | 18 |
| O'Brien, Phil | 1 | 1 |
| O'Brien, Phillip | 0 | 1 |
| O'Connell, Gary | 4 | 28 |
| O'Connor, Joshua | 2 | 6 |
| O'Halloran, Clare | 0 | 2 |
| O'Kelly, Joseph | 1 | 1 |
| O'Leary, Keller | 2 | 2 |
| O'Neil, Chris | 0 | 1 |
| O'Neil, Christopher | 1 | 1 |
| O'Neil, Emily | 10 | 105 |
| O'Neill, Danny | 1 | 21 |
| O?Neil, Emily | 4 | 52 |
| O?Neill, Kevin | 0 | 3 |
| Obermeyer, Jared | 0 | 2 |
| Obtuse, Agent | 0 | 9 |
| Ocariz Iglesias, Fernando Jose | 1 | 1 |
| Ocariz, Chicho | 2 | 2 |
| Ocariz, Chico | 1 | 1 |
 Octavius Knorr | 1 | 1 |
| Oden, Matthias | 0 | 1 |
| Oedekoven, Kevin | 1 | 1 |
| Ohlsson, Jesper | 1 | 1 |
| Okamoto, Jeff | 3 | 5 |
| Okawada, Akira | 2 | 2 |
| Okerstrom, Per | 0 | 11 |
| Okum, David | 2 | 2 |
| Olausson, Anders | 0 | 3 |
| Olejnyik, Attila | 1 | 1 |
| Oli Jeffery | 2 | 2 |
| Oliver Frey | 5 | 0 |
| Oliver Harrop | 0 | 1 |
| Oliver Lucas | 1 | 1 |
| Oliver McNeil | 1 | 1 |
| Oliver Schmidt | 0 | 1 |
| Oliver, Alan | 1 | 1 |
| Oliver, Stephen | 1 | 1 |
| Olivier Melison | 2 | 2 |
| Olivo, Nick | 1 | 1 |
| Olmstead-Dean, J Gordon | 0 | 2 |
| Olsen, Dustin | 1 | 1 |
| Olson, Christopher | 1 | 1 |
| Olson, Sterling | 0 | 1 |
| Omichinski, Tyler | 8 | 27 |
| Oracz, Michal | 2 | 5 |
| Orlando Moreira | 2 | 2 |
| Orlock, Bree | 8 | 7 |
| Orrin Grey | 0 | 1 |
| Orth, Philip G | 2 | 2 |
| Ortloff-Tang, Alexander | 1 | 1 |
| Oscar G Becerra | 1 | 1 |
| Oscar Rios | 59 | 228 |
| Oscar Sedholm | 3 | 3 |
| Osman Zeki Yanasik | 0 | 1 |
| Osmundsen, Truls | 0 | 1 |
| Ospa, Jazmin | 3 | 4 |
| Osser, Barry | 2 | 0 |
| Ossi Noita | 1 | 1 |
| Ossoway, John | 18 | 55 |
| Ostergaard, Martin Ingerslev | 0 | 2 |
| Ostlien, Judie | 1 | 1 |
| Oswin, Mark | 1 | 0 |
| Otterlei, Alex | 1 | 18 |
| Otus, Ray | 1 | 1 |
| Overlord, Marty | 1 | 145 |
| Owen Guthrie | 1 | 10 |
| Owen K C Stephens | 2 | 2 |
| Owen, Paul | 3 | 3 |
| Oxbow, Craig | 0 | 1 |
| Oz Mills | 1 | 11 |