After the outbreak of the war, Olszyna-Wilczyński's unit was to prepare the defense of the area between Biebrza River, Suwałki, and Wizna.
It is one of the centers of the Polish minority in Belarus and the death-place of Gen. Józef Olszyna-Wilczyński.
Józef Piłsudski | Józef Ignacy Kraszewski | Józef Simmler | Józef Poniatowski | Jozef Gabčík | Józef Michalik | Józef Andrzej Załuski | Józef Dominik | University of Pavol Jozef Šafárik | Józef Wybicki | Jozef Štafura | Józef Razowski | Józef Maria Hoene-Wroński | Józef Mackiewicz | Józef Kustroń | Jozef Israëls | Józef Dwernicki | Jozef Cleber | Józef Brudziński | Jozef Brudzinski | Józef Bem | St. John's church, Jan Kazimierz Wilczyński | Józef Zajączek | Józef Wojciechowski | Jozef Tomko | Józef Sowiński | Józef Potocki | Józef Pietrończyk | Józef Peszka | Józef Olszyna-Wilczyński |
Jan Kazimierz Wilczyński was born in Jasonys near Utena.