| Name and firstname(s) | Name Toernooibase | Club or Country |
 Klasic, Ivan | Ivan Klasic | Yugoslavia |
 Klava, Gatis | Gatis Klava | Latvia |
 Kleeberg, | Kleeberg | France |
 Klein, Cathleen | Cathleen Klein | Germany |
 Klein, Hendrik | Henk Klein (26.09.1906 - 09.02.1973) Add info | |
 Klein, Mevr. | Mevr. Klein | Belgium |
| Klein, NN. | NN. Klein | Belgium |
| Kleinmann, Roger | Roger Kleinmann (01.01.1940 - 05.12.2022) | |
 Kleinmoedig, Marwin | Marwin Kleinmoedig | Curacao |
 Klikunova, Elyzaveta | Elyzaveta Klikunova | Ukraine |
 Klimantovich, Pavel | Pavel Klimantovich | Russia |
 Klimasheva, Elena | Elena Klimasheva | Foreign players |
| Klimavics, Raimonds | Raimonds Klimavics | Latvia |
| Klimenkov, Alex | Alex Klimenkov | Germany |
 Klimenok, Roman | Roman Klimenok | Belarus |
| Klimentov, Nikolai | Nikolai Klimentov | Russia |
| Klimov, Leonid | Leonid Klimov | Russia |
 Klimowitsj, Sergey | Sergey Klimowitsj | USSR |
| Klionski, Mark | Mark Klionski | USSR |
| Klochak, Ulyana | Ulyana Klochak | Ukraine |
 Klomp, Maxmilian Olivier | Maxmilian Olivier Klomp | Czech Republic |
 Klusovski, Maksim Darius | Maksim Darius Klusovski | Lithuania |
| Kluss, Onufrijs | Onufrijs Kluss | Latvia |
| Klykova, Ekaterina | Ekaterina Klykova | Russia |
 Kmiec, Paulina | Paulina Kmiec | Poland |
| Knap, Sebastian | Sebasitian Knap | Poland |
| Knap-Flisikowska, Marta | Marta Knap-Flisikowska | Poland |
 Knepa, Henry | Henry Knepa | Aruba |
| Knevels, Bart | Bart Knevels | Belgium |
| Knevels, Jos | Jos Knevels | Belgium |
| Knevets, Sergei | Sergei Knevets | Russia |
| Knobloch, B. | B. Knopbloch | Germany |
| Knock, de, Yagud | Yagud de Knock | Belgium |
 Knoester, Peter | Peter Knoester | Canada |
 Knyazyan, Aram | Aram Knyazyan | Armenia |
 Koala, Yacouba | Yacouba Koala | Burkina Faso |
| Koanda, Mahamoudou | Mahamoudou Koanda | Burkina Faso |
 Kobayashi, Toshio | Toshio Kobayashi | Japan |
| Kobelashvili, Luka | Luka Kobelashvili | Czech Republic |
| Kobelev, V. | V. Kobelev | USSR |
 Kobilov, Shakhzod | Shakhzod Kobilov | Uzbekistan |
| Koblevskii, Vladislav | Vladislav Koblevskii | Russia |
| Kobrina, Lubov | Lubov Kobrina | Belarus |
| Kobtsev, Ivan Timofejevitsj | Ivan Kobtsev | Ukraine |
| Kobylinski, Miroslaw | Miroslaw Kobylinski | Poland |
| Kobzev, Tymofii | Tymofii Kobzev | Ukraine |
 Koca, Tuana Lal | Tuana Lal Koca | Turkey |
| Kocarov, Vadim | Vadim Kocarov | Russia |
| Kochneva, Ekaterina | Ekaterina Kochneva | Russia |
| Kochur, V. | V. Kochur | Foreign players |
| Kociszewski, Adam | Adam Kociszewski | Poland |
| Kock, Dylan | Dylan Kock | Aruba |
 Kodyo, Ativi Dagnon | Ativi Dagnon Kodyo | Togo |
| Koeiman, Dayanara | Dayanara Koeiman | Curacao |
| Koenraed, NN. | NN. Koenraed | Belgium |
| Koesnetsow, B. | B. Koesnetsow | USSR |
 Koetoe, Regie | Regie Koetoe | Suriname |
| Koeznetsowa, Galina | Galina Koeznetsowa | Russia |
 Koffi, Aka Armand | Aka Armand Koffi | Ivory Coast |
| Koffi, Akounda Charles | Koffi Akounda Charles | Ivory Coast |
| Koffi , Bi Zan | Koffi Bi Zan | Ivory Coast |
| Koffi, Guy | Guy Koffi | Ivory Coast |
| Koffi, Konan Ange Joel | Konan Ange Joel Koffi | Ivory Coast |
| Koffi, Konan Bruno | Konan Bruno Koffi | Ivory Coast |
| Koffi, Konan Paul | Konan Paul Koffi | Ivory Coast |
| Koffi, Kouakou Patrice | Kouakou Patrice Koffi | Ivory Coast |
 Koffi Kaledje, Gerald | Gerald Koffi Kaledje | Cameroon |
 Kofman, Grigori | Grigori Kofman | Moldava, Republic of |
| Kogan, Marat | Marat Kogan | |
| Kogevnikov, Andriy | Andriy Kogevnikov | Ukraine |
| Kogotko, Alexander Ivanovich | Alexander Kogotko | Belarus |
| Kohn, Michel | Michel Kohn | Belgium |
| Kohno, Eya | Eya Kohno | Belarus |
| Kohon, Gnomblei Patrick | Gnomblei Patrick Kohon | Ivory Coast |
| Kohou, Bi Kouame Williams | Kohou Bi Kouame Williams | Ivory Coast |
 Koik, Heino | Heino Koik | Estonia |
| Kok, Leo | Leo Kok | Belgium |
| Koko, Deomar | Deomar Koko | Curacao |
| Koko, Kouassi Bernard | Kouassi Bernard Koko | Ivory Coast |
| Koko, Vanderbrok | Vanderbrok Koko | Ivory Coast |
| Kokolo, Jean Marie | Jean Marie Kokolo | France |
| Kokora, Severin | Severin Kokora | Ivory Coast |
| Kokorin, Nikolai | Nikolai Kokorin | Russia |
| Kokorina, Ariana | Ariana Kokorina | Russia |
| Kokoura, Assoumou Eugene | Assoumou Eugene Kokoura | Ivory Coast |
 Kola, Stephane | Stéphane Kola | Central African Republic |
| Kolanikovs, Marks | Marks Kolanikovs | Latvia |
| Kolas, Mikita | Mikita Kolas | Belarus |
| Kolasinski, Adam | Adam Kolasinski | Poland |
| Kolbase, Elizabete | Elizabete Kolbase | Latvia |
| Koleda, Marija | Marija Koleda | Latvia |
| Kolembet, Laura | Laura Kolembet | Ukraine |
| Kolesnik, Vladimir | Vladimir Kolesnik | Ukraine |
| Kolesnikov, Artem | Artem Kolesnikov | Russia |
| Kolesnikov, Mikhail | Mikhail Kolesnikov | Russia |
 Kolesnikov, Roman | Roman Kolesnikov | Israel |
| Kolesov, Dmitrii | Dmitrii Kolesov | Russia |
| Kolesov, Gawril | Gawril Kolesov | Russia |
| Kolhoe, J. | J. Kolhoe | Suriname |
| Kolibabchuk, Viktoriya | Viktoriya Kolibabchuk | Ukraine |
