Cognomen Ернестина (Ernestina 
, Ernestine 
, Arnoštka 
) , globally, is a common last name. The cognomen Ернестина is habitual in Latin America and the Caribbean, particularly Mexico, where it is quite a common surname, Nicaragua, and Honduras (explore the name in all countries). Measured by absolute frequency, the name is most common in Mexico, Cameroon, and Honduras. Also, Ернестина is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ernestina | Mexico, Ghana, United States, Argentina, Brazil |
| Ernestine | Italy, Mexico, Ghana, United States, Cameroon |
| Arnoštka | Czechia |
| Ернестина | Ukraine, Russia |
Ernestyna, Jernestina, Эрнестин, Эрнестина, and ايرين