Cognomen Khaophichai (Khaophichai 
) , around the globe, is a very rare family name. The family name Khaophichai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khaophichai | Thailand |
Komsan, Wipada, Suphawadi, and Khanuengnit