Family name Frosia (Frosia 
, Фрося 
, فروسيا) , in all the world, is a very rare surname. The cognomen Frosia is habitual in Georgia, where it is quite a rare surname, Armenia, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. More prevalently, Frosia is the forename as well as the last name.