Surname Loreto Rosario (Loreto Rosario 
) , worldwide, is an extremely rare last name. The cognomen Loreto Rosario is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More prevalently, Loreto Rosario is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Loreto Rosario | Chile, Spain |