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Cognomen Rizak (Rizak , Ризак , Різак ) , across the world, is quite a rare surname. The surname Rizak is habitual in Ukraine, where it is quite a rare surname, Czechia, where it is a rare surname, and Georgia. Measured by absolute frequency, this name is the most popular in Ukraine, Indonesia, and Czechia. Much less frequently, Rizak is the forename as well as the last name.