Biljan families are Croats and they are mostly from Gospic. In the past century, relatively most of Croatian residents bearing this family name were born in Gospic and Rijeka. In Mušaluk in Gospic every seventh inhabitant had the family name Biljan.
Prevalence
About 420 people with faimily name Biljan live in Croatia today, in 200 households. There were 530 of them in the middle of the past century, and their number decreased by 20 percent. They are located in almost all Croatian counties, in 38 cities and 48 other places, mostly in Zagreb (65), Musaluk (45), Gospic (30), Sisak (25), and in Osijek (25).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over forty times, the first time 1683 in source Catholic Church Parish Records.