Cognomen ลาชัย (Lachai 
, ลาชัย , La Chai) , worldwide, is a rare last name. The surname ลาชัย is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, Myanmar, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Thailand, Myanmar, and India. Likewise, ลาชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lachai | China, Thailand, United States, India, Myanmar |
| ลาชัย | Thailand |