In Croatia, Gjilas families are Croats (from Novska area ). In the past century, relatively most of Croatian residents bearing this family name were born in Novska area and in Krizevci.
Prevalence
Only a few people with faimily name Gjilas live in Croatia today, in 6 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, two cities and another small place , mostly in Zagreb (<5), Krizevci (<5), and in Jasenovac in Novska area (<5).
Outside Croatia
Family name Gjilas is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.