Cognomen ธรรมสัน (Thammason 
, Thamason 
, ธรรมสัน ) , across the world, is a rare last name. The last name ธรรมสัน is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, ธรรมสัน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ธรรมสัน, Thammason | Thailand |
| Thamason | Spain, United States, Thailand |