Cognomen Rueangchay (Rueangchay 
) , in the world, is a very rare surname. The surname Rueangchay is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rueangchay | Thailand |
Pakaon, Yanisa, Sorawit, Rassamee, and Budsayarungsri