Surname กำจาย (Kamchai 
, Kamjai 
, กำจาย) , throughout the world, is a rare last name. The last name กำจาย is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and China, where it is an extremely rare surname. Likewise, กำจาย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kamchai | India, United States, China, Thailand |
| Kamjai | India, Malaysia, Thailand |