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Cognomen Korosi (Korosi ) , across the world, is quite a rare family name. The last name Korosi is characteristic of Hungary, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Greece, where it is a rare surname. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Hungary, Slovakia, and Romania. Much less frequently, Korosi is the forename as well as the last name.