In Croatia, Viola families are generally Croats (from Pazin area ), very rarely Hungarians (from Rijeka ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Pazin area and in Backa, Vojvodina.
Prevalence
About 30 people with faimily name Viola live in Croatia today, in 16 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, in 6 cities and two other places, mostly in Rijeka (<10), Osijek (<10), Zagreb (<10), Karojba in Pazin area (<10), and in Pula (<5).
Outside Croatia
Family name Viola (including: Violla , Vihola , Vhiola and Violah ) is present in 95 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.