Žmuk families are Croats and they are mostly from Varazdin area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and in Varazdin area.
Prevalence
About 100 people with faimily name Žmuk live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number increased by 30 percent. They are located in threee Croatian counties, four cities and 9 other places, mostly in Trnovec in Varazdin area (45), Varazdin (10), Zamlaka in Varazdin area (<10), Hrastovljan in Ludbreg area (<10), and in Zagreb (<5).
Outside Croatia
Family name Žmuk (including: Zmuk , Zhmuk ) is present in five countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.