| Name and firstname(s) | Name Toernooibase | Club or Country |
 Nurmohamed, Rene | René Nurmohamed | Den Haag |
 Nurullayev, Nazim | Nazim Nurullayev | Azerbaidzjan |
| Nurullayeva, Kifayat | Kifayat Nurullayeva | Azerbaidzjan |
| Nurullazade, Nigar | Nigar Nurullazade | Azerbaidzjan |
 Nutdanai, Jaratwiboonkul | Jaratwiboonkul Nutdanai | Thailand |
 Nutma, Gerke | Gerke Nutma (06.09.1941 - 04.03.2022) Add info | |
 Nuvel, van, Paul Philippe | Paul Philippe van Nuvel | France |
| Nuveld, Willem | Willem Nuveld (09.06.1945 - 04.12.2021) | |
 Nuys, Bob | Bob Nuys | DID Bergambacht |
 Nuyts, Marc | Marc Nuyts | Belgium |
 Nyambayar, Khangai | Khangai Nyambayar | Mongolia |
 Nyambi, Valentin | Valentin Nyambi | Cameroon |
| Nyamdavaa, Amarbayasgalan | Amarbayasgalan Nyamdavaa | Mongolia |
| Nyamjav, Nomin | Nomin Nyamjav | Mongolia |
| Nyamkhuu, Naljormaa | Naljormaa Nyamkhuu | Mongolia |
| Nyamsambuu, Khosbayar | Khosbayar Nyamsambuu | Mongolia |
| Nyamsambuu, Zolbayar | Zolbayar Nyamsambuu | Mongolia |
 Nyamsi Tomi, Maturin | Maturin Nyamsi Tomi | CEMA - De Vaste Zet Geleen |
| Nyamsuren, Lkhagvasuren | Lkhagvasuren Nyamsuren | Mongolia |
| Nyangar, Byambajargal | Byambajargal Nyangar | Mongolia |
 Nyangasa, Nzita Tity | Nzita Tity Nyangasa | Congo Democratic Republic |
 Nych, Anatoli Grigorijevitsj | Anatoli Nych | Ukraine |
| Nyland, D.M. | D.M. Nyland | Belgium |
 Nyrov, Arsen | Arsen Nyrov | Russia |
| Nyssen, Andre | André Nyssen | Belgium |
| Nyssen, Renee | Renée Nyssen | Belgium |
| Nyssens, Frederic | Frédéric Nyssens | Belgium |
| Nyssens, Hughes | Hughes Nyssens | Belgium |
| Nzaya , Chance | Chance Nzaya Wonso | Congo Democratic Republic |
| Nzeza Ntalu, Brown | Brown Nzeza Ntalu | Congo Democratic Republic |
| Nzouangwa, Darcisse | Darcisse Nzouangwa | Cameroon |
| Nzuzi, Charly | Charly Nzuzi Mbongosi | Congo Democratic Republic |
| Nzuzi, Nzuzi | Nzuzi Nzuzi | Congo Democratic Republic |
| Nzuzi, Pierre | Pierre Nzuzi Lukoki | Congo Democratic Republic |
 Oberoi, Tarannum | Tarannum Oberoi | India |
 Oblescak, Ljubo | Ljubo Oblešcak | Slovenia |
 Obornik, Matej | Matej Obornik | Czech Republic |
 Obtsjedkov, S. | S. Obtsjedkov | USSR |
| Obukhova, Diana | Diana Obukhova | Russia |
| Ochirbat, Batmunkh | Batmunkh Ochirbat | Mongolia |
 Ociepa, Barbara | Barbara Ociepa | Poland |
 Ock, W. (dubbel) | dubbele invoer | |
| Odbayar, Ariunjargal | Ariunjargal Odbayar | Mongolia |
| Oderkiewicz, Przemyslaw | Przemyslaw Oderkiewicz | Poland |
| Odia, Emmanuel | Emmanuel Odia | France |
| Odintsjow, Vladimir | Vladimir Odintsjow | USSR |
| Odnoo, Odontuya | Odontuya Odnoo | Mongolia |
| Odor, Jan | Jan Odor | Belgium |
 Odrins, Arturs | Arturs Odrins | Latvia |
 Oduber, Eddy | Eddy Oduber | Aruba |
 Oeditdoebe, Robby | Robby Oeditdoebe | Suriname |
 Oeffelen, van, Michiel | Michiel van Oeffelen | Zwart-Wit 86 Malden |
 Oegema, Bert | Bert Oegema | Dokkum - Rinsumageest |
| Oegema, Tjalling | Tjalling Oegema (27.05.1946 - 04.07.2021) Add info | |
| Oeij, Tim-Tobi | Tim-Tobi Oeij | |
| Oeij, Yonathan | Yonathan Oeij | |
 Oelen, Bram | Bram Oelen | Witte van Moort Westerhaar |
| Oelen, Tim | Tim Oelen | Witte van Moort Westerhaar |
 Oenen, van, Ouke | Ouke van Oenen | De Waarddammers |
 Oepasie, Bisoenkoemar | Bisoenkoemar Oepasie (16.06.1958 - 25.06.2023) Add info | |
| OERTERP, Ethan | Ethan | |
| OERTERP, Sietse Roel | Sietse Roel | |
| OERTERP-DS19, Broes | Broes | |
| OERTERP-DS19, Senne | Senne | |
| OERTERP-DS19, Siem | Siem | |
| Oestjanov, Stanislav (dubbel) | dubbele invoer | |
| Oetelaar, van den, Lous | Lous van de Oetelaar (04.01.1940 - 26.08.2022) Add info | |
 Oetelaar, van den, Mari | Mari van den Oetelaar | DAmateurs |
| Oetelaar, van den, Maud | Maud van den Oetelaar | |
| Oevelen, van, Ch. | Ch. van Oevelen | |
| Offenberg, Henk | Henk Offenberg | |
 Offenga, Henry | Henry Offenga | Harderwijk |
 Offerman, Rudsel | Rudsel Offerman | Curacao |
| Offinga, Tjitse | Tjitse Offinga | |
| Offinga, Theo | Theo Offinga | |
| Ofman, P. | P. Ofman | |
| Ofwegen, van, Johannes | Johannes van Ofwegen (24.06.1912 - 28.08.1997) Add info | |
| Ogorodnikov, Jurij | Jurij Ogorodnikov | USSR |
 Oh, En-Jie | En-Jie Oh | Taipei |
 Oijen, van, J. | J. van Oijen | Componisten |
 Oink, B | B. Oink | DEZ Oudendijk |
 Ojabstein, Uudo | Uudo Ojabstein | Estonia |
 Okken, Ben | Ben Okken | Damclub Hengelo |
 Okken, Jacob | Jacob Okken | Hijken DTC |
| Okkens, A. | A. Okkens | |
| Okker, Jonas | Jonas Okker (24.10.1862 - 08.09.1925) Add info | |
 Okkerse, Jan | Jan Okkerse | Lent |
| Okoemov, Konstantin | Konstantin Okoemov | Russia |
| Okoneshnikov, Ruslan | Ruslan Okoneshnikov | Russia |
| Okouere, Aivry | Aivry Okouere | Lent |
| Okraszewski, Wojciech | Wojciech Okraszewski | Poland |
| Okrogelnik, Ferdi | Ferdi Okrogelnik | |
| Okrogelnik, Hans | Hans Okrogelnik | |
| Okrogelnik, Rudy | Rudy Okrogelnik | |
 Okrogelnik, Wiel | Wiel Okrogelnik | Damclub Roermond |
| Oksman, Boris | Boris Oksman | Russia |
| Olaerts, Harry | Harry Olaerts | Belgium |
| Olaerts, Maria | Maria Olaerts | Belgium |
| Olaerts, Paula | Paula Olaerts | Belgium |
| Olaerts, Piet | Piet Olaerts | Belgium |
