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Last name Zaak (泽 , 澤 , Zaak ) , in the entire world, is a common surname. The family name Zaak is habitual in China, where it is quite a rare surname, Libya, where it is a rare surname, and Tunisia. Measured by absolute frequency, it is the most numerous in China, Algeria, and Pakistan. More prevalently, Zaak is the forename as well as the last name.