Last name Jaiyoung (Jaiyoung 
) , in the world, is a very rare family name. The cognomen Jaiyoung is characteristic of Thailand, where it is an extremely rare surname, and China. More frequently, Jaiyoung is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaiyoung | Thailand, China, South Korea, United States |