Family name Кьолер (Koler 
, Кьолер 
) , in the world, is quite a rare last name. The family name Кьолер is characteristic of Slovenia, where it is quite a rare surname, Croatia, and Austria. Not in comparison with a country's population, it most frequently occurs in the United States, India, and Malaysia. Much less frequently, Кьолер is the forename as well as the last name.