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Cognomen Synko (Synko , سينكو, Синко ) , worldwide, is a rare family name. The cognomen Synko is habitual in Eastern Europe, particularly Russia, where it is a rare surname, Poland, where it is a very rare surname, and Ukraine. Not in comparison with a country's population, it is the most numerous in Russia, the United States, and Poland. Very seldom, Synko is the forename as well as the last name.