In Croatia, Krupička families are generally Croats (from Cazma area ), very rarely Bulgarians (from Zapresic ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Cazma area.
Prevalence
About 20 people with faimily name Krupička live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, two cities and two other places, mostly in Zagreb (<10), Zapresic (<5), Velika Ludina in Cazma area (<5), and in Lokve in Delnice area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.