Cognomen Ernoe (Ernö 
, Ernoe 
) , in all the world, is a rare surname. The cognomen Ernoe is habitual in Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and Hungary. Also, Ernoe is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ernö | United States, South Africa, Sweden, Germany, Hungary |
| Ernoe | Denmark, United States, Norway, Germany, Hungary |