| Link | Location | |
|---|---|---|
 | Petrucci Oscar | Milan, Italy |
 | Konstantins Oševerovs | Riga, Latvia |
| Taito Oshima | Tokyo, Japan |
 | Kenji Oshio | Tokyo, Japan |
| Siarhei Oshyn | Minsk, Belarus |
| 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 |
