Last name กูลชัย (Kunchai 
, กูลชัย ) , around the world, is a rare surname. The family name กูลชัย is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, กูลชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kunchai | Myanmar, India, Malaysia, Thailand, United States |
| กูลชัย | Thailand |