In Croatia, Variola families are Croats (from the Island of Krk ). In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Krk and in Zagreb.
Prevalence
About 10 people with faimily name Variola live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number halved. They are located in only four Croatian places: in Rasopasno on the Island of Krk (<10), Rijeka (<5), Podrvanj in Rijeka area (<5), and in Zagreb (<5).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States (1) and Germany (1). Family name Variola is present in 12 countries on three continents. The family name "Variola " is used by some 100 people in Italy , about 70 in Brazil , and small number of people in the United States.
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.