Cognomen Karolos (Karolos 
, Карлос 
) , throughout the world, is a rare family name. The surname Karolos is habitual in Armenia, where it is quite a rare surname, Greece, and Belarus, where it is a rare surname. In absolute terms, it most frequently occurs in Greece, Armenia, and Russia. Likewise, Karolos is the forename as well as the last name.