Family name Sungsin (Sungsin 
) , in the world, is a very rare cognomen. The cognomen Sungsin is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Sungsin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sungsin | Canada, South Korea, Thailand, United States |