Surname กำชัย (Kamchai 
, Kumchai , Gumchai ) , globally, is a rare cognomen. The surname กำชัย is characteristic of Thailand, where it is a rare surname, China, where it is an extremely rare surname, and India. Also, กำชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kamchai | India, United States, China, Thailand |
| Kumchai | India, Thailand |
| Gumchai | Thailand |