Dugi families are Croats and they are mostly from Ivanec area. In the past century, relatively most of Croatian residents bearing this family name were born in Ivanec area and in Zagreb. In Gornje Vratno in Ivanec area every fourtieth inhabitant had the family name Dugi.
Prevalence
About 80 people with faimily name Dugi live in Croatia today, in 30 households. There were 90 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 10 Croatian counties, in 9 cities and 9 other places, mostly in Zagreb (20), Cestica in Ivanec area (15), Ples in Lepoglava area (10), Marina in Trogir area (<10), and in Karlovac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.