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Family name 성민 (성민 , Seongmin , Seong-Min ) , all over the world, is a rare cognomen. The family name 성민 is characteristic of South Korea, where it is quite a rare surname, Japan, where it is a very rare surname, and Malaysia. In absolute terms, it is commonest in Eastern Asia, particularly South Korea, China, and Japan. Predominantly, 성민 is the forename as well as the last name.