In Croatia, Koldžić families are Croats (from Slavonski Brod area ). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod area and in Zagreb.
Prevalence
About 10 people with faimily name Koldžić live in Croatia today, in five households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Zagreb (<10), Varazdin (<5), Gornji Andrijevci in Slavonski Brod area (<5), Split (<5), and in Pula (<5).
Outside Croatia
Family name Koldžić is present in this form only in Croatia.