In Croatia, Žak families are generally Croats (from Bjelovar ), very rarely Ukrainians (from Vukovar ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Bjelovar.
Prevalence
About 40 people with faimily name Žak live in Croatia today, in 19 households. There were 50 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 8 Croatian counties, in 9 cities and threee other places, mostly in Zagreb (10), Bjelovar (10), Jazvenik (<10), Vukovar (<5), and in Nova Gradiska (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.