Brenko families are Croats and they are mostly from Pazin area. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and in Pazin area. In places Orič and Sveta Katarina in Pazin area every seventh inhabitant had the family name Brenko.
Prevalence
About 200 people with faimily name Brenko live in Croatia today, in 80 households. There were 220 of them in the middle of the past century, and their number decreased by 10 percent. They are located in four Croatian counties, in 11 cities and 19 other places, mostly in Pula (60), Oric in Pazin area (35), Zagreb (30), Rijeka (<10), and in Sveti Petar u Sumi in Pazin area (<5).
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.