In Croatia, Đustebek families are mainly Serbs, equally Croats (from Petrinja ). In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Sisak.
Prevalence
About 20 people with faimily name Đustebek live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, four cities and two other places, mostly in Petrinja (<10), Velika Gorica (<10), Zagreb (<5), Sisak (<5), and in Dvor in Hrvatska Kostajnica area (<5).
Outside Croatia
Family name Đustebek (including: Djustebek , Gjustebek ) is present in two countries.