Family name Thoopthien (Thoopthien 
) , in all the world, is a very rare surname. The surname Thoopthien is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thoopthien | Thailand |
Ornpuk, Nathapat, Kotchakron, and Kotchakorn