In the entire world, ธีรรัช (ธีรรัช 
) is a very rare unisex first name. The given name ธีรรัช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare epicene name.
| VARIANT | COUNTRY |
|---|---|
| ธีรรัช | Thailand |
จันทรขจร, and เรืองถาวรสุข