Surname แจ่มชื่น (Chaemchuen 
, แจ่มชื่น, Caemchuen ) , in all the world, is a rare family name. The family name แจ่มชื่น is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, แจ่มชื่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chaemchuen | United States, Thailand |
| Caemchuen | Thailand |