Cognomen Sawangnop (Sawangnop 
) , in the entire world, is a very rare family name. The last name Sawangnop is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sawangnop | Thailand |
Amphorn, Songtham, Kiattisak, and Kritchayada