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Surname Susak (Susak , สุศักดิ์ , Сусак ) , in all the world, is quite a rare family name. The family name Susak is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a common surname, Serbia, where it is quite a rare surname, and Slovenia. Not in comparison with a country's population, this name is the most popular in Bosnia and Herzegovina, Ukraine, and Serbia. Much less frequently, Susak is the forename as well as the last name.