Cognomen Thongjing (Thongjing 
) , in the entire world, is a very rare last name. The last name Thongjing is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Thongjing is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thongjing | Thailand, India |