The list included the "elite of Polish scholarship", signatories such as Tadeusz Kotarbiński, sociologists Józef Chałasiński, Stanisław and Maria Ossowska and Jan Stanisław Bystroń, biologists Stanisław Kulczyński and Jan Dembowski, psychologist Władysław Witwicki, physicist Konstanty Zakrzewski, and historians Seweryn Wysłouch, Tadeusz Manteuffel and Natalia Gąsiorowska.
Jan Stanisław Bystroń (1892–1964), his son, Polish sociologist and ethnographer
Jan van Eyck | Jan Matejko Academy of Fine Arts | Jan Hammer | Jan Peerce | Jan Hus | Jan Mayen | Stanisław August Poniatowski | Jan Guillou | Stanisław Lem | Jan Smuts | Jan Fabre | Jan Morris | Jan Matejko | Stanisław Ignacy Witkiewicz | Jan Garbarek | Ignacy Jan Paderewski | Stanisław Jerzy Lec | Jan van Riebeeck | Jan Troell | Stanisław Skrowaczewski | Jan Tinbergen | Jan Neruda | Jan-Michael Vincent | Jan Kochanowski | Jan Brewer | Jan Bechtum | Stanisław Wyspiański | Stanisław Poniatowski | Stanisław Moniuszko | Stanisław Bułak-Bałachowicz |