Brleković families are Croats and they are mostly from Hrvatska Kostajnica area. In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Zagreb. In Greda Sunjska in Hrvatska Kostajnica area every tenth inhabitant had the family name Brleković.
Prevalence
About 270 people with faimily name Brleković live in Croatia today, in 110 households. There were 340 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 10 Croatian counties, in 19 cities and 42 other places, mostly in Zagreb (25), Lekenik in Petrinja area (20), Greda Sunjska in Hrvatska Kostajnica area (20), Leskovec Toplicki (15), and in Rasinja in Koprivnica area (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1691 in source Catholic Church Parish Records.