In Croatia, Stjepanek families are predominantly Croats (from Djakovo area ), rarely Czechs (from Kutina ). In the past century, relatively most of Croatian residents bearing this family name were born in Kutina and in Djakovo area.
Prevalence
About 50 people with faimily name Stjepanek live in Croatia today, in 18 households. There were 40 of them in the middle of the past century, and their number increased by 30 percent. They are only located in in 6 Croatian cities and two other places, mostly in Banova Jaruga (15), Osijek (10), Medjuric (<10), Slavonski Brod (<5), and in Staro Pracno (<5).
Outside Croatia
Family name Stjepanek is present in four countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.