In Croatia, Štepanko families are Croats (from Belisce ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Belisce.
Prevalence
About 10 people with faimily name Štepanko live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Belisce (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.