Family name ธรรมนา (Thamna 
, ธรรมนา , Damhana 
) , around the world, is a rare last name. The family name ธรรมนา is habitual in Thailand, where it is a rare surname, India, where it is an extremely rare surname, and the United States. Also, ธรรมนา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thamna | United Arab Emirates, United States, Thailand, India, Brazil |
| ธรรมนา | Thailand |
| Damhana | Philippines |