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Last name Chengen (承恩 , Chengen , 成恩 ) , across the world, is quite a rare surname. The cognomen Chengen is habitual in Mauritius, where it is quite a rare surname, the Dominican Republic, where it is a rare surname, and Kenya. Measured by absolute frequency, the name is most common in China, Kenya, and Mauritius. More frequently, Chengen is the forename as well as the last name.