Cognomen Atthasart (Atthasart 
) , all around the world, is an extremely rare family name. The cognomen Atthasart is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Atthasart is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Atthasart | Thailand |
Arthan, Philaken, and Pongpanitch