In Croatia, Dubaz families are Italians (from Buje ). In the past century, relatively most of Croatian residents bearing this family name were born in Umag.
Prevalence
About 10 people with faimily name Dubaz live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two naselja i to in Buje (<5) and Triban (<5).
Outside Croatia
Family name Dubaz is present in four countries on three continents. The family name "Dubaz " is used by some 60 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.