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Cognomen Krisak (กฤช , Krisak , Крисак ) , worldwide, is a rare family name. The cognomen Krisak is characteristic of Ukraine, where it is quite a rare surname, Estonia, where it is a rare surname, and Hungary. Not in comparison with a country's population, it most frequently occurs in Ukraine, the United States, and Russia. More frequently, Krisak is the forename as well as the last name.