Family name Jaiin (Jaiin 
) , throughout the world, is a rare last name. The surname Jaiin is characteristic of Thailand, where it is a rare surname, India, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. In absolute terms, it is commonest in Thailand, India, and China. Likewise, Jaiin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaiin | Thailand, United States, India, South Korea, China |