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Cognomen Koros (Cruz , Koros , Корос ) , around the world, is a prevalent surname. The last name Koros is habitual in Guam, where it is a prevalent surname, Honduras, and Mexico (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Mexico, Brazil, and Philippines. Very seldom, Koros is the forename as well as the last name.