In Croatia, Kopsejak families are Croats (from Vrbovec area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Vrbovec area.
Prevalence
About 10 people with faimily name Kopsejak live in Croatia today, in five households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Zagreb (<10), in Preseka (<5) and Zabnjak (<5) in Vrbovec area, Veliki Raven (<5), and in Donja Velika in Vrbovec area (<5).
Outside Croatia
Family name Kopsejak is present in this form only in Croatia.