Cognomen Efrossyni (Efrossyni 
) , across the world, is an extremely rare family name. The last name Efrossyni is characteristic of Latin America and the Caribbean, particularly Argentina, where it is an extremely rare surname. Much more frequently, Efrossyni is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Efrossyni | United Kingdom, Greece, South Africa, United States, Argentina |