Biloglav families are Croats and they are mostly from Zadar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and in Zadar area. In Zemunik Donji in Zadar area every fourtieth inhabitant had the family name Biloglav.
Prevalence
About 130 people with faimily name Biloglav live in Croatia today, in 50 households. There were 70 of them in the middle of the past century, and their number increased by 90 percent. They are located in four Croatian counties and 5 other places, mostly in Zadar (65), Zemunik Donji in Zadar area (40), Zagreb (20), Rijeka (<5), and in Velika Gorica (<5).
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.