Ilijaš families are Croats and they are mostly from Pregrada. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Pregrada.
Prevalence
About 300 people with faimily name Ilijaš live in Croatia today, in 130 households. There were 330 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 25 cities and 37 other places, mostly in Zagreb (90), Cakovec (20), Sesvete (20), Gornja Plemenscina (15), and in Svetojurski Vrh (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.