Surname Setthaya (Setthaya 
) , all over the world, is a very rare family name. The last name Setthaya is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Setthaya | Thailand |
Sopit, Prasert, Naruemon, Setthawat, and Nutthaphat