Žanko families are Croats and they are mostly from Sinj. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and Split.
Prevalence
About 260 people with faimily name Žanko live in Croatia today, in 110 households. There were 260 of them in the middle of the past century, and their number remains constant. They are located in 10 Croatian counties, in 15 cities and 15 other places, mostly in Obrovac Sinjski (85), Sinj (50), Split (40), Zagreb (35), and in Slavonski Brod (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1929 in source Emigration Commission Zagreb.