Cognomen Somsawan (สมสวรรค์ 
, Somsawan 
) , worldwide, is quite a rare last name. The surname Somsawan is characteristic of South-eastern Asia, particularly Laos, where it is quite a common surname, and Thailand, where it is a very rare surname. Much less frequently, Somsawan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมสวรรค์ | Thailand |
| Somsawan | Laos, United States, Thailand |