Cognomen รุ่งเจริญถาวร (รุ่งเจริญถาวร, Rungjaoenthawon 
) , around the globe, is an extremely rare family name. The surname รุ่งเจริญถาวร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rungjaoenthawon | Thailand |