Family name Khunthawichai (Khunthawichai 
) , around the globe, is a very rare last name. The family name Khunthawichai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khunthawichai | Thailand |
Nonglak, Porntida, and Chatchadaporn