Cognomen ดวงจัน (ดวงจัน 
) , in all the world, is a very rare surname. The cognomen ดวงจัน is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ดวงจัน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ดวงจัน | Thailand |