Family name Jaehaeng (Jaehaeng 
) , throughout the world, is a very rare cognomen. The surname Jaehaeng is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Jaehaeng is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaehaeng | South Korea, Thailand |