Cognomen Jarko (Жарко 
, Jarko 
, Ярко ) , around the globe, is quite a rare surname. The cognomen Jarko is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Slovakia. In absolute terms, it most frequently occurs in Eastern Europe, particularly Ukraine, Russia, and Belarus. Very seldom, Jarko is the forename as well as the last name.