Koprek families are Croats and they are mostly from Varazdin area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and in Varazdin area. In Seketin in Varazdin area every sixth inhabitant had the family name Koprek.
Prevalence
About 230 people with faimily name Koprek live in Croatia today, in 90 households. There were 210 of them in the middle of the past century, and their number increased by 10 percent. They are located in 10 Croatian counties, in 12 cities and 28 other places, mostly in Beretinec in Varazdin area (30), Zagreb (30), Turcin in Varazdin area (25), Varazdin (25), and in Koprivnica (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.