In the entire world, Mercedes Lastenia (Mercedes Lastenia 
) is a very rare feminine first name. The given name Mercedes Lastenia is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare female name, and Peru. Very seldom, Mercedes Lastenia is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mercedes Lastenia | Ecuador, Chile, Peru |