Cognomen Tongyoung (Tongyoung 
) , worldwide, is a very rare surname. The last name Tongyoung is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tongyoung | Thailand |
Pamon, Sukanya, Parnuchote, Narupol, and Thanaporn