In Croatia, Debeljaković families are almost entirely Croats (from Nova Gradiska area ), 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 Bosnian Krajina (Prnjavor area).
Prevalence
About 40 people with faimily name Debeljaković live in Croatia today, in 15 households. There were 20 of them in the middle of the past century, and their number doubled. They are located in 7 Croatian counties and 7 other places, mostly in Rovinjsko Selo (<10), Zagreb (<10), Ratkovac in Nova Gradiska area (<10), Sisak (<5), and in Virovitica (<5).
Outside Croatia
Family name Debeljaković is present in 6 countries on four continents. The family name "Debeljakovic " is used by small number of people in the United States and small number in Argentina.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.