In Croatia, Cajsperk families are Czechs by relative majority (from Daruvar area ), less frequently Croats (from Daruvar ), and rarely Hungarians (also from Daruvar ). In the past century, relatively most of Croatian residents bearing this family name were born in Daruvar.
Prevalence
About 10 people with faimily name Cajsperk live in Croatia today, in three households only. They are located in only threee Croatian places: in Golubinjak in Daruvar area (<10), Daruvar (<5), and in Doljani (<5).
Outside Croatia
Family name Cajsperk is present in this form only in Croatia.