Family name ธัญเดช (ธัญเดช 
) , around the globe, is a very rare last name. The family name ธัญเดช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ธัญเดช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธัญเดช | Thailand |