| Link | Location |
|---|---|
| Michał Jagielski | Warszawa, Poland |
| Bogusława Jagła | Kraków, Poland |
| Robert Jagoda | Katowice, Poland |
| Juliusz Jagodziński | Warsaw, Poland |
| Robin Jahdi | London, United Kingdom |
| Piyush Jain | Jordan, Minnesota, United States |
| Devika Jaiswal | Utrecht, Netherlands |
| Puneet Jaiswal | London, United Kingdom |
| Matthias Jakob | Munich, Germany |
| Michał Jakubas | Gdynia, Poland |
| PARVATHI JAMMU | Eden Prairie, Minnesota, United States |
| 張承龍 | Tokyo, Japan |
| Marzena Janiszewska | Warszawa, Poland |
| Łukasz Jankowski | Lodz, Poland |
| Valdis Janovs | Kopenhagen, Denmark |
