Surname ธารเดช (ธารเดช 
, Tharadet 
) , in the world, is an extremely rare last name. The last name ธารเดช is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ธารเดช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธารเดช | Thailand |
| Tharadet | Thailand, United States |