Worldwide, Mercedes Eloisa (Mercedes Eloisa 
) is a very rare girly forename. The first name Mercedes Eloisa is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare feminine name, and Peru. Very seldom, Mercedes Eloisa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mercedes Eloisa | Peru, Argentina, Chile, Ecuador, Costa Rica |