In Croatia, Koprec families are Croats (from Djurdjevac ).
Prevalence
About 10 people with faimily name Koprec live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only two naselja i to in Djurdjevac (<5) and Cepelovac (<5).
Outside Croatia
Family name Koprec (including: Koperec , Coprez ) is present in 6 countries on three continents.
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.