In Croatia, Nizek families are Croats (from Sveti Ivan Zelina ). In the past century, relatively most of Croatian residents bearing this family name were born in Sveti Ivan Zelina and Zagreb. In Polonje in Sveti Ivan Zelina every seventh inhabitant had the family name Nizek.
Prevalence
About 60 people with faimily name Nizek live in Croatia today, in 15 households. There were 80 of them in the middle of the past century, and their number decreased by 30 percent. They are located in threee Croatian counties, four cities and threee other places, mostly in Polonje (35), Novo Mjesto (<10), Krecaves (<10), Zagreb (<5), and in Slavonski Brod (<5).
Outside Croatia
Family name Nizek is present in five countries on three continents. "Niezek " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.