Family name ธรรมวณิช (ธรรมวณิช 
, Thamavanich , Dharmvanij ) , across the world, is a very rare surname. The surname ธรรมวณิช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dharmvanij, Thamavanich, ธรรมวณิช, Thummavanit | Thailand |