Surname Sungsun (Sungsun 
) , in the entire world, is a very rare family name. The surname Sungsun is habitual in Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. More frequently, Sungsun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sungsun | Thailand, South Korea, China, United States |