Fronia is of Slavic origin, specifically from Bulgaria, and means 'free'. It is a unique name that has gained some international recognition but remains relatively uncommon outside its native region.
The name Fronia experienced fluctuating popularity throughout its history, with a notable peak during the early 20th century, particularly between 1915 and 1926 where it reached an average of around 13 births per year. However, after the 1920s, its popularity significantly declined, dropping to an average of less than 7 births per year from the 1930s onwards.