| Link | Location | |
|---|---|---|
 | Bert Omlo | Elst GLD, Netherlands |
| Adlemi-Shell Onas | Manila, Philippines |
 | Michal Ondráček | Brno, Czech Republic |
| Jennifer Oneill | New York, New York, United States |
| Joe ONeill | Savage, Minnesota, United States |
| Clement Ong | Singapore, Singapore |
| Nicole, Mun Yin Ong | Singapore, Singapore |
| Regina Ong | Singapore, Singapore |
 | Sean Ong | Singapore, Singapore |
| Wei Yang Gilbert Ong | Singapore, Singapore |
| Zhe Ming Ong | Singapore, Singapore |
| Nadezhda Onishchuk | Москва, Russia |
| Toshihiro Ono | Tokyo, Japan |
 | Ronald Oomen | Deventer, Netherlands |
 | Martijn Oost | Brussels, Belgium |
