In Croatia, Zajček families are Croats (from Cazma ). In the past century, relatively most of Croatian residents bearing this family name were born in Cazma and Bjelovar. In Donji Miklouš in Cazma every eighth inhabitant had the family name Zajček.
Prevalence
About 60 people with faimily name Zajček live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 30 percent. They are located in 7 Croatian counties, in 7 cities and 6 other places, mostly in Donji Miklous (30), Sopje in Slatina area (<10), Belisce (<10), Zagreb (<10), and in Valpovo (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.