Biloš families are Croats and they are mostly from Imotski area. In the past century, relatively most of Croatian residents bearing this family name were born in Imotsko and in Imotski area. In Hudutsko in Rama (Bosnia) nearly every inhabitant had the family name Biloš.
Prevalence
About 320 people with faimily name Biloš live in Croatia today, in 130 households. There were 160 of them in the middle of the past century, and their number doubled. They are located in the most of Croatian counties, in 27 cities and 18 other places, mostly in Krivodol in Imotski area (90), Zagreb (70), Split (50), Makarska (40), and in Osijek (15).
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.