Cognomen Chalachai (Chalachai 
, ชลาชัย ) , in the world, is a rare surname. The surname Chalachai is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Chalachai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chalachai, ชลาชัย | Thailand |