Bearers of the familyname ZWIR T Z used to live and are still living today mostly in Central Europe. Based on current knowledge, also the roots of the ZWIR T Z families in focus should be found here. While a few sources also document bearers of the surname ZWIR T Z in Belgium and Luxembourg, the majority of bearers of the surname used to settle in former Prussia, later German Empire, after WW II in the German Democratic Republic (GDR) and Federal Republic of Germany (FRG), today‘s Germany.