Family name Khunnasarn (Khunnasarn 
) , in all the world, is a very rare last name. The last name Khunnasarn is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khunnasarn | Thailand |
Prayoon, Atchareeya, Nattachai, Nattachia, and Wannagorn