Family name Thinhuatoei (Thinhuatoei 
) , around the globe, is a very rare cognomen. The cognomen Thinhuatoei is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thinhuatoei | Thailand |
Wasin, Methinee, Piyawong, and Prathumrat