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 | Greece, United Kingdom, South Africa, United States, Cyprus |
| Frosso | Australia, Greece, United Kingdom, United States, Cyprus |
| Euphrosyne | Greece, United Kingdom, South Africa, United States, Germany |
| Ευφροσύνη | Greece |