Cognomen Sawettamrangsi (Sawettamrangsi 
) , across the world, is a very rare family name. The cognomen Sawettamrangsi is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sawettamrangsi | Thailand |
Pongton, Pongtorn, Pimteera, and Patcharapon