Globally, Margarita Ernestina (Margarita Ernestina 
) is a rare feminine given name. The forename Margarita Ernestina is habitual in Latin America and the Caribbean, particularly Chile, where it is quite a rare female name, and Peru, where it is a very rare girly name. Very seldom, Margarita Ernestina is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Margarita Ernestina | Spain, Mexico, Chile, Ecuador, Peru |