Family name Chavanatnusorn (Chavanatnusorn 
) , all over the world, is a very rare surname. The last name Chavanatnusorn is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Chavanatnusorn | Thailand |
Pichai, Kingkoy, Pannika, and Pitchakorn