Family name ดวย (Duai 
, ดวย 
) , around the globe, is a rare surname. The family name ดวย is characteristic of Malaysia, where it is a rare surname, Myanmar, where it is a very rare surname, and Venezuela. Not in comparison with a country's population, it is commonest in Malaysia, Myanmar, and China. Also, ดวย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duai | Myanmar, Indonesia, Malaysia, China, India |
| ดวย | Thailand |