Family name Efthalia (Efthalia 
) , in the entire world, is quite a common cognomen. The cognomen Efthalia is habitual in Greece, where it is quite a common surname, and Belgium, where it is a very rare surname. Also, Efthalia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Efthalia | Belgium, France, Greece, United States, Germany |