Family name ธารัตน์ (ธารัตน์ 
) , all around the world, is an extremely rare last name. The last name ธารัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, ธารัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธารัตน์ | Thailand |