In Croatia, Stifanich families are Croats by relative majority (from Rovinj area ), equally Italians (also from Rovinj area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and in Rovinj area. In Funtana in Rovinj area every twentieth inhabitant had the family name Stifanich.
Prevalence
Only a few people with faimily name Stifanich live in Croatia today, in four households only. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Porec (<5), Funtana in Rovinj area (<5), Cikovici (<5), and in Labin (<5).
Outside Croatia
Family name Stifanich is present in four countries on three continents. The family name "Stifanich " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.