Last name ยาชัย (Yachai 
, ยาชัย ) , throughout the world, is a rare surname. The surname ยาชัย is habitual in Thailand, where it is a rare surname, Israel, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, ยาชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yachai | China, United States, Thailand, India, Israel |
| ยาชัย | Thailand |