Last name จันทร์แจ่ม (Chanchaem 
, Chancham 
, จันทร์แจ่ม) , around the globe, is a rare surname. The surname จันทร์แจ่ม is habitual in Thailand, where it is a rare surname, Morocco, and the United States, where it is an extremely rare surname. Much less frequently, จันทร์แจ่ม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chanchaem, Chanjam | United States, Thailand |
| Chancham | Morocco, India, United States, Thailand |
Chanchalam, Jancham, Janjaem, and Janjoem
| ศุภมิตร จันทร์แจ่ม TH (b. 1957) |
|