In Croatia, Duž families are Croats (from Lepoglava area ). In the past century, relatively most of Croatian residents bearing this family name were born in Lepoglava area and in Zagreb.
Prevalence
About 60 people with faimily name Duž live in Croatia today, in 20 households. There were 40 of them in the middle of the past century, and their number increased by 50 percent. They are located in 6 Croatian counties, in 6 cities and 7 other places, mostly in Grabe in Lepoglava area (20), Zagreb (15), Cazma (<10), Lukac in Virovitica area (<10), and in Virovitica (<5).