Family name Santhawasakun (Santhawasakun 
) , in the entire world, is a very rare last name. The last name Santhawasakun is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Santhawasakun | Thailand |
Chadasa, Ratchata, and Sitthichai