Cognomen Sroysang (Sroysang 
) , all around the world, is an extremely rare family name. The cognomen Sroysang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sroysang | Thailand |
Supap, Banyat, Suparat, and Nutchayapak