Across the world, 재수 (재수 
, Jaesu 
) is quite a rare masculine first name. The given name 재수 is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare boy's name.
| VARIANT | COUNTRY |
|---|---|
| 재수 | South Korea |
| Jaesu | Spain, China, South Korea, United States |
| 이재수 South Korean army general, KR (b. 1958) |
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| 김재수 South Korean mountaineer, KR (b. 1961) |
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| 김재수 KR (b. 1957) |
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| 전재수 South Korean politician, KR (b. 1971) |
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| 이재수 KR (b. 1964) |
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