Throughout the world, อาชัย (Achai 
, อาชัย , Archai 
) is a rare unisex first name. The forename อาชัย is characteristic of Sudan, where it is a rare girly name, Malaysia, where it is a very rare masculine name, and Indonesia. Measured by absolute frequency, it is the most numerous in India, Indonesia, and Sudan. Much less frequently, อาชัย is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Achai | Thailand, India, Sudan, Indonesia, Malaysia |
| อาชัย | Thailand |
| Archai | Thailand, United States |
| Ahchai | Malaysia |