Family name جاسيك (Jacek 
, جاسيك) , in the entire world, is a widespread cognomen. The last name جاسيك is characteristic of Eastern Europe, particularly Poland, where it is a prevalent surname, Hungary, where it is quite a rare surname, and Slovakia. In absolute terms, it is the most numerous in Poland, the United States, and Germany. Much less frequently, جاسيك is the forename as well as the last name.