Bolfek families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Krapina area. In Gornjaki in Vrbovec area every sixth inhabitant had the family name Bolfek.
Prevalence
About 230 people with faimily name Bolfek live in Croatia today, in 100 households. There were 230 of them in the middle of the past century, and their number remains constant. They are located in the most of Croatian counties, in 24 cities and 25 other places, mostly in Zagreb (35), Slatina Svedruska in Krapina area (25), Krizevci (15), Zlatar (15), and in Karlovac (15).
Outside Croatia
Family name Bolfek is present in four countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.