Štefanko families are Croats and they are mostly from Ivanec. In the past century, relatively most of Croatian residents bearing this family name were born in Ivanec and Varazdin.
Prevalence
About 90 people with faimily name Štefanko live in Croatia today, in 40 households. There were 120 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 9 cities and 6 other places, mostly in Prigorec (30), Zagreb (20), Ivanec (10), Antunovac in Osijek area (<10), and in Donja Batina (<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.