Bilobrk families are Croats and they are mostly from Solin area. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and in Middle Bosnia (Travnik area). In Obrovac Sinjski in Sinj every sixth inhabitant had the family name Bilobrk.
Prevalence
About 710 people with faimily name Bilobrk live in Croatia today, in 260 households. There were 280 of them in the middle of the past century, and their number more than doubled. They are located in almost all Croatian counties, in 40 cities and 46 other places, mostly in Obrovac Sinjski (135), Split (95), Zagreb (90), Nisko in Solin area (35), and in Solin (25).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.