Kruljac families are Croats and they are mostly from Delnice area. According to some sources they are from Kranj area (Slovenia). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Slavonski Brod. In Kaluđerovac in Gospic area every third inhabitant had the family name Kruljac.
Prevalence
About 780 people with faimily name Kruljac live in Croatia today, in 370 households. There were 790 of them in the middle of the past century, and their number remains constant. They are located in almost all Croatian counties, in 41 cities and 70 other places, mostly in Zagreb (160), Slavonski Brod (125), Rijeka (60), Ravna Gora in Delnice area (25), and in Nasice (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1736 in source Catholic Church Parish Records.