Cognomen Kaewchaihan (Kaewchaihan 
) , in the entire world, is a very rare last name. The surname Kaewchaihan is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kaewchaihan | Thailand |
Siripan, Preecha, Nantawan, Preeyaphun, and Preeyaphan