Family name Terbtothakun (Terbtothakun 
) , throughout the world, is an extremely rare last name. The family name Terbtothakun is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Terbtothakun | Thailand |
Thadet, Sirikorn, and Paphangkorn