Jacek Tylicki | Jacek Kaczmarski | Jacek Malczewski | Jacek Komuda | Jacek Proć | Jacek Kowalczyk | Jacek Kochan | Jacek Malinowski | Jacek Lachowicz | Jacek Krenz | Jacek Gmoch | Jacek Dehnel | Jacek Bąk |
Osjan was started at the beginning of the 1970 by Jacek Ostaszewski and Marek Jackowski (who latter moved to Maanam).