Last name อาชัย (Achai 
, อาชัย , Archai 
) , throughout the world, is a rare surname. The family name อาชัย is characteristic of Malaysia, where it is a rare surname, Indonesia, where it is a very rare surname, and Israel. Not in comparison with a country's population, this name is the most popular in Malaysia, Indonesia, and Nigeria. More frequently, อาชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Achai | Thailand, India, Sudan, Indonesia, Malaysia |
| อาชัย | Thailand |
| Archai | Thailand, United States |
| Ahchai | Malaysia |