Kusturin families are Croats and they are mostly from Opatija. In the past century, relatively most of Croatian residents bearing this family name were born in Opatija and Rijeka.
Prevalence
About 120 people with faimily name Kusturin live in Croatia today, in 50 households. There were 150 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 7 Croatian counties, in 10 cities and 19 other places, mostly in Jablan (15), Rijeka (15), Zagreb (10), Opatija (10), and in Karlovac (<10).
Outside Croatia
Family name Kusturin is present in 9 countries on three continents. The family name "Kusturin " is used by some 100 people in the United States , about 60 in Italy , and small number of people in Canada.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1933 in source Emigration Commission Zagreb.
