Family name 재수 (재수 
, Jaesu 
) , across the world, is a very rare last name. The last name 재수 is habitual in China, where it is an extremely rare surname, and the United States. Much more frequently, 재수 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 재수 | South Korea |
| Jaesu | Spain, South Korea, China, United States |