Around the world, 재연 (Jaeyeon 
, 재연 , Jae-Yeon ) is quite a rare gender-neutral first name. The first name 재연 is habitual in South Korea, where it is quite a rare unisex name, Japan, where it is a very rare girly name, and the United States, where it is an extremely rare unisex name. Much less frequently, 재연 is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Jaeyeon | Japan, China, South Korea, United States, Canada |
| 재연 | South Korea |
| Jae-Yeon | South Korea, United States |
| Jae-Youn | Canada, United States |
| 어재연 korean military personnel, KR (b. 1823) |
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하재연 South Korean poet and professor (born 1975), KR (b. 1975) |
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정재연 South Korean actress and singer, KR (b. 1979) |
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전재연 female badminton player from South Korea, KR (b. 1983) |
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| 가재연 KR (b. 1923) |
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| 이재연 South Korean academic, KR (b. 1970) |
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| 최재연 KR (b. 1974) |
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| 원재연 South Korean classical pianist, KR (b. 1988) |
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| 황재연 South Korean Go player, KR (b. 1995) |
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| 김재연 KR (b. 1989) |
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