Surname ถาวรวัฒนยงค์ (ถาวรวัฒนยงค์ 
, Thavornwattanayong , Thawornwattanayong ) , throughout the world, is a very rare last name. The last name ถาวรวัฒนยงค์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thawornwattanayong, ถาวรวัฒนยงค์, Thavornwattanayong | Thailand |