Džanko families are Croats and they are mostly from western Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Split. In Mladeškovci in Western Bosnia every third inhabitant had the family name Džanko.
Prevalence
About 130 people with faimily name Džanko live in Croatia today, in 60 households. There were 40 of them in the middle of the past century, and their number tripled. They are located in the most of Croatian counties, in 13 cities and 16 other places, mostly in Osijek (35), Split (20), Dalj in Vinkovci area (15), Vukovar (<10), and in Kastel Luksic (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.