Dugan families are Croats and they are mostly from Zlatar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zlatar area and in Zagreb.
Prevalence
About 100 people with faimily name Dugan live in Croatia today, in 40 households. There were 150 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 6 Croatian counties, four cities and 10 other places, mostly in Zagreb (40), in Krapinica (20) and Zajezda (10) in Zlatar area, Varazdin (<10), and in Sesvete (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.