Debeljak families are usually Croats and they are mostly from Banja Luka area (Bosnia). According to some sources they are from Hrvatskog Zagorja, very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Zagreb.
Prevalence
About 910 people with faimily name Debeljak live in Croatia today, in 360 households. There were 630 of them in the middle of the past century, and their number increased by 40 percent. They are located in all Croatian counties, in 49 cities and 128 other places, mostly in Zagreb (180), Kutina (45), Osijek (45), Dugo Selo (35), and in Jezevo in Dugo Selo area (25).
Outside Croatia
At least 15 families with this surname emigrated from Croatia to: Germany (8), Austria (3), Australia (2), and to the United States (2). Family name Debeljak is present in 22 countries worldwide. The family name "Debeljak " is used by some 200 people in Syria , about 100 in Germany , and some 50 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over forty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.
