Cognomen Thanh Sơn (Thanh Sơn 
) , across the world, is a very rare last name. The surname Thanh Sơn is habitual in South-eastern Asia, particularly Vietnam, where it is a very rare surname. Also, Thanh Sơn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanh Sơn | Vietnam, Japan |