Surname Khamjaisai (Khamjaisai 
) , around the globe, is a very rare family name. The last name Khamjaisai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khamjaisai | Thailand |
Jeerana, Piyaporn, and Jongkonnee