Last name ชัยนาจ (ชัยนาจ 
) , around the world, is an extremely rare family name. The cognomen ชัยนาจ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, ชัยนาจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ชัยนาจ | Thailand |