Family name Чеплак (Чеплак 
, Batagelj 
) , in the entire world, is a rare surname. The cognomen Чеплак is habitual in Southern Europe, particularly Slovenia, where it is quite a common surname, Serbia, where it is quite a rare surname, and Croatia, where it is a rare surname. Not in comparison with a country's population, the name is most common in Slovenia, Serbia, and Ukraine.