Last name Retia (Retia 
) , worldwide, is a rare family name. The surname Retia is habitual in Romania, where it is a rare surname, Algeria, where it is a very rare surname, and Indonesia. More prevalently, Retia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Retia | Indonesia, Romania, Algeria, United States, India |