In Croatia, Šupljina families are predominantly Croats (from Pazin area ), rarely Italians (from Buje ). In the past century, relatively most of Croatian residents bearing this family name were born in Pazin area and in Buzet area.
Prevalence
About 10 people with faimily name Šupljina live in Croatia today, in 7 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only four Croatian places: in Tupljak in Pazin area (<10), Buje (<5), Pula (<5), and in Boljun in Buzet area (<5).
Outside Croatia
At least five families with this surname emigrated from Croatia to: Australia (3), the United States (1), and to Germany (1). Family name Šupljina is present in this form only in Croatia.
