Across the world, 성연 (Sungyeon 
, 성연 , Sung-Yun ) is quite a rare unisex first name. The first name 성연 is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare gender-neutral name. Very seldom, 성연 is the last name as well as the forename.
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성연 South Korean singer, KR (b. 1999) |
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| 강성연 South Korean actress and singer, KR (b. 1976) |
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| 김성연 South Korean voice actress, KR (b. 1980) |
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| 황성연 KR |
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| 박성연 South Korean singer, KR (b. 1992) |
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| 한성연 South Korean actress, KR (b. 1997) |
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| 김성연 South Korean singer, KR |
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