Janković families are mainly Croats and they are mostly from Slavonski Brod area. According to some sources they are from Bisko near Trilj or from Bosnia, rarely Serbs, and Roms (Bjelovar). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Slavonski Brod. In places Oriovčić and Jakačina Mala in Slavonski Brod area every third inhabitant had the family name Janković.
Prevalence
About 4100 people with faimily name Janković live in Croatia today, in 1900 households. There were 4000 of them in the middle of the past century, and their number remains constant. They are located in all Croatian counties, in 94 cities and 415 other places, mostly in Zagreb (640), Rijeka (175), Osijek (155), Slavonski Brod (135), and in Split (125).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over a hundred times, the first time 1749 in source 18th Century Census.