| Link | Location |
|---|
| Glenn Onos | Matthews, North Carolina, Stati Uniti |
| Ronald Oomen | Deventer, Paesi Bassi |
| Martijn Oost | Brussels, Belgio |
| Erik Oosterhuis | Bergschenhoek, Paesi Bassi |
| Frey Oosterlinck | Harelbeke, Belgio |
| Albert Oosthuizen | Johannesburg, Sudafrica |
| Piotr Opalacz | Kraków, Polonia |
| Pavel Oparin | Almaty, Kazakistan |
| Yulia Openysheva | Moscow online, Russia |
| Douglas Opfer | Houston, Texas, Stati Uniti |
| Bas Opgelder | Hoofddorp, Paesi Bassi |
| Heino Ophey | Karlsruhe, Germania |
| Luca Oppedisano | Turin, Italia |
| Thomas Oppermann | Berlin, Germania |
| Gabriela Oprea | Bucharest, Romania |
