Last name Ευφροσύνη (Froso 
, Frosso 
, Euphrosyne 
) , in all the world, is a rare cognomen. The family name Ευφροσύνη is habitual in Greece, where it is quite a rare surname, and the United States, where it is an extremely rare surname. More prevalently, Ευφροσύνη is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Froso | United Kingdom, Greece, South Africa, Cyprus, United States |
| Frosso | United Kingdom, Greece, Australia, Cyprus, United States |
| Euphrosyne | United Kingdom, Germany, Greece, South Africa, United States |
| Ευφροσύνη | Greece |