Cognomen Erika Erna (Erika Erna 
) , all around the world, is a very rare surname. The cognomen Erika Erna is habitual in Chile, where it is a very rare surname, and Germany, where it is an extremely rare surname. More prevalently, Erika Erna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Erika Erna | Germany, Chile |