Cognomen Cmil (Cmil 
, Цмиль 
) , globally, is a rare family name. The cognomen Cmil is habitual in Eastern Europe, particularly Slovakia, where it is a rare surname, Czechia, and Poland, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Slovakia, the United States, and Poland. Also, Cmil is the forename as well as the last name.