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Surname Kasak (Kasak , กาศักดิ์ , กาสัก ) , across the world, is quite a rare family name. The cognomen Kasak is habitual in Estonia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Czechia. Not in comparison with a country's population, it is the most numerous in Estonia, Turkey, and Poland. Also, Kasak is the forename as well as the last name.