Surname Tongtiang (Tongtiang 
) , in the world, is a very rare last name. The family name Tongtiang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tongtiang | Thailand |
Suwanna, Panoopong, Jurairat, Traisaran, and Pattaratida