Cognomen Duannual (Duannual 
) , in the world, is a very rare family name. The last name Duannual is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Duannual | Thailand |
Manas, Somchai, Tavesak, Thanawat, and Ruethairat