Family name Mekhaamnuaychai (Mekhaamnuaychai 
) , around the globe, is a very rare surname. The cognomen Mekhaamnuaychai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mekhaamnuaychai | Thailand |
Surapol, Phatchisa, and Pattcharawee