Last name Karnchai (Karnchai 
) , around the globe, is a very rare surname. The cognomen Karnchai is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Karnchai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Karnchai | United States, Thailand |