In Croatia, Bilac families are Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Djakovo area.
Prevalence
Only a few people with faimily name Bilac live in Croatia today, in one household only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Osijek (<10) and Zagreb (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.