Belak families are Croats and they are mostly from Sibenik. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Samobor. In Vrsno in Sibenik every sixth inhabitant had the family name Belak.
Prevalence
About 350 people with faimily name Belak live in Croatia today, in 160 households. There were 410 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 29 cities and 30 other places, mostly in Sibenik (50), Zagreb (45), Split (35), Samobor (20), and in Vrsno (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.