| Link | Location | |
|---|---|---|
 | Kenji Oshio | Tokyo, Japan |
 | Elisey Oshlokov | Москва, Russia |
| Siarhei Oshyn | Minsk, Belarus |
| Piotr Osinski | Munich, Germany |
| Martin Osovsky | Prague, Czech Republic |
 | Josip Osrečki | Zagreb, Croatia |
 | John Ossendorp | Nieuwegein, Netherlands |
| Jenny Ossmann | Munich, Germany |
 | Bart Oste | Brussels, Belgium |
| Jens Ostergaard | Orlando, Florida, United States |
 | Steve Ostermiller | Saratoga Springs, Utah, United States |
| Christian Osvald | Singapore, Singapore |
| Kaiichiro Ota | Ibaraki, Osaka, Japan |
| Olga Otorowska | Krakow, Poland |
| Paul Otte | Utrecht, Netherlands |
