Šadek families are Croats and they are mostly from Djurdjevac area. In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica and in Djurdjevac area.
Prevalence
About 100 people with faimily name Šadek live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number increased by 20 percent. They are located in 9 Croatian counties, in 8 cities and 17 other places, mostly in Molve in Djurdjevac area (15), Djurdjevac (10), Novo Virje in Djurdjevac area (10), Rijeka (<10), and in Zagreb (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.