| Link | Location |
|---|
| Piotr Osinski | Munich, Germany |
| Inga Osovsky | New York, New York, United States |
| Martin Osovsky | Prague, Czechia |
| Josip Osrečki | Zagreb, Croatia |
| John Ossendorp | Nieuwegein, Netherlands |
| Jenny Ossmann | Munich, Germany |
| Vladimir Ostapenko | Minsk, Belarus |
| Bart Oste | Brussels, Belgium |
| Jens Ostergaard | Orlando, Florida, United States |
| Darcy Osterhaus | Hartford, Connecticut, United States |
| Steve Ostermiller | Saratoga Springs, Utah, United States |
| Alberto Osuji | Lagos, Nigeria |
| Christian Osvald | Singapore, Singapore |
| Kaiichiro Ota | Ibaraki, Osaka, Japan |
| Olga Otorowska | Krakow, Poland |
