| Name and firstname(s) | Name Toernooibase | Club or Country |
 Sidorowicz, Marcin | Marcin Sidorowicz | Poland |
 Sidoruk, Anatol | Anatol Sidoruk | Germany |
 Siebelt, Tom | Tom Siebelt | Lent |
 Sieben, Esmee | Esmee Sieben | Limburgse Jeugd |
 Siegelaar, Guillaume | Guillaume Siegelaar | |
 Siegerist, J. | J. Siegerist | |
 Siegers, Dick | Dick Siegers | Haarlemse Damclub |
 Siegers, Jan | Jan Siegers | Zuidwolde |
 Siegers, Roland | Roland Siegers | De Schijf Roosendaal |
| Siemens, Marcel | Marcel Siemens | |
| Siemonsma, Roswitha | Roswitha Siemonsma | |
| Sier, Jack | Jac Sier (06.07.1937 - 26.09.2010) Add info | |
| Sier, Klaas | Klaas Sier (07.05.1928 - 12.07.2015) Add info | |
| Sier, Paul | Paul Sier | |
| Sier, Wim | Wim Sier | |
| Sierksma, Minze | Minze Sierksma | |
 Siesling, Jan | Jan Siesling | Componisten |
 Sieswerda, Sietse | Sietse Sieswerda | Hartwert e.o. |
| Sietsma, Klaas | Klaas Sietsma | |
 Siffer, Stefan | Stefan Siffer | Belgium |
 Sigal, Bella | Bella Sigal | Moldava, Republic of |
 Sigal, L. | L. Sigal | France |
 Sigida, Ilya | Ilya Sigida | LDG Leiden |
 Sigmundova, Katerina | Katerina Sigmundova | Czech Republic |
 Signorini, Diego | Diego Signorini | Italy |
 Sigue, Pierre | Pierre Sigue | USA |
 Siim, Rainer | Rainer Siim | Estonia |
 Sijbers, Jack | Jack Sijbers | Damclub Roermond |
| Sijbrands, Joop | Joop Sijbrands | |
 Sijbrands, Ton | Ton Sijbrands | Heijmans Excelsior Rosmalen |
| Sijde, van de, Taco | Taco van de Sijde | |
| Sijm, Jacob | Jacob Sijm (01.01.1904 - 05.02.1981) Add info | |
 Sijm, Remmert | Remmert Sijm | Enkhuizer Damclub |
| Sijperda, Jelmer | Jelmer Sijperda | |
| Sijtsma, Auke | Auke Sijtsma | |
| Sijtsma, Maarten | Maarten Sijtsma | |
| Sikkema, Bouke | Bouke Sikkema | |
| Sikkema, Kasper | Kasper Sikkema | |
| Sikkema, Kor | Kor Sikkema (01.02.1942 - 09.12.2019) Add info | |
 Sikkema, Niko | Niko Sikkema | DV Warffum |
| Sikkema, Riekele | Riekele Sikkema ( - 26.05.2004) Add info | |
 Sikkema, Wiebe | Wiebe Sikkema | Heteren |
| Sikkema, Willem | Willem Sikkema | |
 Sikkenga, Hugo | Hugo Sikkenga | HDC Hoogeveen |
 Sikkens, Jan | Jan Sikkens | Roden-Leek |
| Sikkens, Jan (dubbel) | dubbele invoer | |
| Sikkes, Hotze | Hotze Sikkes | |
| Sikma, Piet | Piet Sikma | Hartwert e.o. |
 Sikora, J. | J. Sikora | Czechoslovakia |
| Sikora, Ondrej | Ondrej Sikora | Czech Republic |
| Sikorova, Kristina | Kristina Sikorova | Czech Republic |
 Siksma, Bareld | Bareld Siksma | O.K.K. |
| Sild, Joanna | Joanna Sild | Estonia |
| Silfhout, van, Herman | Herman van Silfhout (31.03.1925 - 05.03.1992) Add info | |
| Silfhout, van, N. (dubbel) | dubbele invoer | |
 Siliman, Doucoure | Doucoure Siliman | Mali |
 Silina, Annija | Annija Silina | Latvia |
| Silins, Lauris | Lauris Silins | Latvia |
 Silo, Grigorijus | Grigory Silo (21.01.1911 - 03.05.2017) Add info | |
 Silue, Kipetanny | Silue Kipetanny | Ivory Coast |
 Silva, Camilo | Camilo Silva | Portugal |
 Silva, Luis Gonzaga | Luis Gonzaga Silva | Brazil |
| Silva, Marcos Ellerson Azevedo | Marcos Ellerson Azevedo Silva | Brazil |
| Silva, Rui | Rui Silva | Portugal |
| Silva, Sebastio Igreja | Sebastio Igreja Silva | Brazil |
| Silva, Wellington Souza | Wellington Souza Silva | Brazil |
| Silva, da, Genaldo Gonzaga | Genaldo Gonzaga da Silva | Brazil |
| Silva, da, Sandoval | Sandoval da Silva | Brazil |
| Silva Cabral, Marcio Aurelio | Marcio Aurelio Silva Cabral | Brazil |
| Silva Filho, Jose Maria | Jose Maria Silva Filho | Brazil |
| Silva Junior, Jose Correia | Jose Correia Silva Junior | Brazil |
| Silva Masarin, Gabriela | Gabriela Silva Masarin | Brazil |
 Silverios, Socrate | Socrate Silverios | Dominican Republic |
| Silvis, Jos | Jos Silvis | Componisten |
| Silvy, Henri | Henri Silvy | France |
 Sima, Mindaugas | Mindaugas Sima | Lithuania |
| Simao, Malagueta | Malagueta Simao | Portugal |
| Simenaite, Milana | Milana Simenaite | Lithuania |
| Simeon, Daniel | Daniel Siméon | France |
| Simeon, Marie-Therese | Marie Thérèse Siméon | France |
| Simin, Kirill | Kirill Simin | |
| Simmons, Francisco | Francisco Simmons | |
| Simmons, Joseph | Joseph Simmons | USA |
| Simoes, Manuel F. | Manuel F. Simoes | Portugal |
 Simon, Paulvin | Paulvin Simon | Canada |
 Simon, Csaba | Csaba Simon | Hungary |
 Simon, E. | E. Simon | PSV Dammen Eindhoven |
| Simon, H. | H. Simon | Componisten |
| Simon, Jean-Marie | Jean-Marie Simon | Canada |
| Simon, Justin | Justin Simon | |
| Simon, Leon | Léon Simon | Belgium |
| Simonata, Jean | Jean Simonata (23.11.1928 - 16.09.2015) Add info | |
| Simonelli, Roberto | Roberto Simonelli | Italy |
| Simonet, | Simonet | France |
 Simonian, Boris | Boris Simonian | USSR |
 Simonis, Julie | Julie Simonis | JDV Heerlen |
 Simonov, Vladimir | Vladimir Simonov | Russia |
| Simons, Andre | Andre Simons | |
| Simons, Eugene | Eugene Simons | |
| Simons, H. | H. Simons | Belgium |
