Duvančić families are Croats and they are mostly from Knin area. In the past century, relatively most of Croatian residents bearing this family name were born in Knin area and in Zagreb. In Razvođe in Knin area every fifth inhabitant had the family name Duvančić.
Prevalence
About 350 people with faimily name Duvančić live in Croatia today, in 140 households. There were 180 of them in the middle of the past century, and their number doubled. They are located in the most of Croatian counties, in 26 cities and 16 other places, mostly in Zagreb (75), Split (55), Solin (25), Razvodje in Knin area (20), and in Rijeka (15).
Outside Croatia
Family name Duvančić is present in five countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.