Cognomen Ernestia (Ernestia 
) , all over the world, is a very rare surname. The last name Ernestia is habitual in Indonesia, where it is a very rare surname, and Israel. Very seldom, Ernestia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ernestia | Indonesia, South Africa, Mexico, United States, France |