Family name Кацин (Kacin 
, Katsin 
, Katzin 
) , across the world, is quite a rare surname. The family name Кацин is characteristic of Slovenia, where it is quite a common surname, Serbia, where it is quite a rare surname, and Czechia, where it is a rare surname. In absolute terms, it is commonest in the United States, Slovenia, and Czechia. Much less frequently, Кацин is the forename as well as the last name.