In Croatia, Koper families are Slovenes by relative majority (from Knin area ), equally Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik.
Prevalence
Only a few people with faimily name Koper live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two Croatian places: in Vrbnik in Knin area (<5) and Knin (<5).