Globally, 희성 (희성 
, Hee-Sung 
) is quite a rare unisex forename. The given name 희성 is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare gender-neutral name.
| 이희성 South Korean military officer and politician, KR (b. 1924) |
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| 조희성 Founder of new religious movements of South Korea (1931-2004), KR (b. 1931) |
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| 정희성 South Korean poet, KR (b. 1945) |
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| 이희성 South Korean baseball player (1966-), KR (b. 1966) |
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| 이희성 KR (b. 1962) |
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| 문희성 South Korean baseball player (1973-), KR (b. 1973) |
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| 양희성 South Korean comedian, KR (b. 1976) |
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| 이희성 South Korean Go player, KR (b. 1982) |
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| 박희성 South Korean footballer, KR (b. 1987) |
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| 이희성 South Korean baseball player (1988-), KR (b. 1988) |
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| 곽희성 South Korean actor, KR (b. 1990) |
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| 박희성 South Korean footballer, KR (b. 1990) |
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| 포희성 KP |
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| 이희성 association football player (1990-), KR (b. 1990) |
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| 윤희성 South Korean model, KR (b. 1990) |
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