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Family name Seon (顺 , Seon , 선 ) , in the entire world, is a widespread surname. The last name Seon is characteristic of South Korea, where it is quite a common surname, China, where it is quite a rare surname, and Malaysia. Measured by absolute frequency, it most frequently occurs in China, South Korea, and France. Likewise, Seon is the forename as well as the last name.