Cognomen ดวงสนธิ (ดวงสนธิ 
, Duangsonthi ) , around the world, is a very rare family name. The last name ดวงสนธิ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ดวงสนธิ, Duangsonthi | Thailand |