Surname Wanchoochai (Wanchoochai 
) , all over the world, is a very rare family name. The surname Wanchoochai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wanchoochai | Thailand |
Apinan, Terawat, Petcharin, and Phetcharin