Family name ທນາ (ທນາ 
) , all around the world, is a very rare cognomen. The cognomen ທນາ is habitual in South-eastern Asia, particularly Laos, where it is a rare surname. More prevalently, ທນາ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ທນາ | Laos |