In Croatia, Kozjan families are Croats (from Karlovac ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Jastrebarsko.
Prevalence
About 60 people with faimily name Kozjan live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number remains constant. They are only located in in 7 Croatian cities and 7 other places, mostly in Karlovac (20), Jastrebarsko (<10), Visnjevac (<10), Sunja in Hrvatska Kostajnica area (<10), and in Mahicno (<10).
Outside Croatia
Family name Kozjan (including: Kozian , Kozyan ) is present in 16 countries on four continents. The family name "Kozjan " is used by small number of people in Canada and small number of people in the United States. "Kozian " is used by some 200 people in Germany , small number in the United States , and small number of people in Austria.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.