Surname จันทร์แจ่มสุข (Chanjamsuk 
, จันทร์แจ่มสุข) , in all the world, is an extremely rare last name. The surname จันทร์แจ่มสุข is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, จันทร์แจ่มสุข is the forename as well as the last name.