In Croatia, Šustek families are predominantly Croats (from Vrbovec area ), rarely Slovaks (from Nasice ), and barely Bosniaks (from Nasice area ). In the past century, relatively most of Croatian residents bearing this family name were born in Vrbovec area and in Nasice.
Prevalence
About 60 people with faimily name Šustek live in Croatia today, in 20 households. There were 40 of them in the middle of the past century, and their number increased by 30 percent. They are located in threee Croatian counties and 10 other places, mostly in Breznica Nasicka in Nasice area (15), Koritna in Vrbovec area (10), Nasice (<10), Zagreb (<10), and in Osijek (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1943 in source Directorium ARCHI-DIOECESI ZAGREBIENSI.