Cognomen Kobarsa (Kobarsa 
) , throughout the world, is a very rare family name. The family name Kobarsa is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kobarsa | Thailand |
Samroeng, Natahrada, Nattharada, and Natthawadee