Cognomen จันชัย (Chanchai 
, จันชัย ) , around the globe, is quite a rare family name. The surname จันชัย is characteristic of Thailand, where it is quite a rare surname, Malaysia, where it is a very rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Thailand, China, and Malaysia. More frequently, จันชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chanchai | Hong Kong, Myanmar, Thailand, Laos, United States |
| จันชัย | Thailand |