Family name Cumak (Cumak 
) , in the world, is a rare last name. The surname Cumak is habitual in Lithuania, where it is quite a rare surname, Slovakia, where it is a rare surname, and Croatia, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Turkey, Lithuania, and Slovakia. Very seldom, Cumak is the forename as well as the last name.