Brezac families are usually Croats and they are mostly from Labin , barely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Labin and Pula. In Ivanje on the Island of Cres every second inhabitant had the family name Brezac.
Prevalence
About 170 people with faimily name Brezac live in Croatia today, in 90 households. There were 240 of them in the middle of the past century, and their number decreased by 30 percent. They are only located in in 9 Croatian cities and 22 other places, mostly in Labin (40), Pula (30), Rijeka (20), Vinez (15), and in Kapelica (10).
Outside Croatia
At least 16 families with this surname emigrated from Croatia to: the United States (10), Australia (4), France (1), and to Sweden (1). Family name Brezac is present in 9 countries on four continents. The family name "Brezac " is used by some 200 people in France , about 60 in Australia , and small number of people in the United States.
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.