Family name ธรรมสูตร (ธรรมสูตร 
) , in all the world, is a rare cognomen. The surname ธรรมสูตร is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ธรรมสูตร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธรรมสูตร | Thailand |