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Cognomen 승훈 (승훈 , Seunghun , Seung-Hoon ) , in all the world, is a rare surname. The family name 승훈 is habitual in Isle of Man, where it is quite a rare surname, South Korea, where it is a rare surname, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in South Korea, China, and Isle of Man. Predominantly, 승훈 is the forename as well as the last name.