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Last name Sanzi (三子 , 三仔 , Sanzi ) , all around the world, is quite a rare cognomen. The cognomen Sanzi is characteristic of Armenia, where it is quite a rare surname, Italy, where it is a rare surname, and Kyrgyzstan. Measured by absolute frequency, it is commonest in Italy, China, and the United States. Also, Sanzi is the forename as well as the last name.