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Cognomen Tzi (지 , Tzi , Ци ) , globally, is a common surname. The cognomen Tzi is habitual in South Korea, where it is quite a common surname, Guatemala, where it is quite a rare surname, and Taiwan, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in South Korea, Guatemala, and Myanmar. Very seldom, Tzi is the forename as well as the last name.