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Surname Simko (Simko , Симко , Сімко ) , worldwide, is quite a common family name. The cognomen Simko is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Hungary, and Czechia, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Slovakia, the United States, and Hungary. Much less frequently, Simko is the forename as well as the last name.