Cognomen Hirunyawong (Hirunyawong 
) , all over the world, is a very rare last name. The last name Hirunyawong is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hirunyawong | Thailand |
Sorrarin, Chunyanut, and Chunyanutch