In Croatia, Kojčin families are predominantly Croats (from Senj area ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Senj area and in Ogulin.
Prevalence
About 10 people with faimily name Kojčin live in Croatia today, in five households only. There were 40 of them in the middle of the past century, and their number decreased significantly. They are located in 6 Croatian counties and two other places, mostly in Ogulin (<10), Velika Gorica (<5), Rijeka (<5), Vodotec in Senj area (<5), and in Zagreb (<5).