Cognomen สมจันทร (สมจันทร 
) , across the world, is an extremely rare last name. The last name สมจันทร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, สมจันทร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมจันทร | Thailand |