In Croatia, Dadaček families are Croats (from Cazma area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Cazma area.
Prevalence
About 10 people with faimily name Dadaček live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only five naselja i to in Bjelovar (<10), Narta in Cazma area (<5), Gornje Plavnice (<5), Gudovac (<5), and in Zagreb (<5).
Outside Croatia
Family name Dadaček 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 1926 in source Emigration Commission Zagreb.