Last name Dueñas Osorio (Dueñas Osorio 
) , in the entire world, is a very rare family name. The surname Dueñas Osorio is habitual in Ecuador, where it is a very rare surname, Chile, and Spain, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dueñas Osorio | Ecuador, Chile, Spain |