Family name ดูลย์ (Dun 
, ดูลย์ 
) , around the globe, is a common last name. The surname ดูลย์ is characteristic of Netherlands, where it is quite a rare surname, Bahamas, and Malaysia. Not in comparison with a country's population, the name is most common in China, Indonesia, and Malaysia. Much less frequently, ดูลย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dun | Myanmar, Venezuela, Indonesia, Malaysia, China |
| ดูลย์ | Thailand |