In Croatia, Sotošek families are generally Croats (from Kraljevica ), very rarely Slovenes (from Buje area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Rijeka.
Prevalence
About 30 people with faimily name Sotošek live in Croatia today, in 18 households. There were 20 of them in the middle of the past century, and their number increased by 40 percent. They are located in 6 Croatian counties, in 6 cities and two other places, mostly in Zagreb (15), Kraljevica (<10), Varazdin (<10), Rijeka (<5), and in Brezje in Samobor area (<5).
Outside Croatia
Family name Sotošek is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.