Family name ธีระธาร (ธีระธาร 
) , in the entire world, is a very rare cognomen. The cognomen ธีระธาร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ธีระธาร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธีระธาร | Thailand |