In Croatia, Kotaranin families are mainly Croats (from Petrinja ), less frequently Serbs, and barely Czechs (from Grubisno Polje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Petrinja and Sisak.
Prevalence
About 50 people with faimily name Kotaranin live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 6 Croatian counties and 9 other places, mostly in Petrinja (10), Zagreb (10), Sisak (<10), Veliki Grdjevac in Grubisno Polje area (<5), and in Maljevac in Slunj area (<5).
Outside Croatia
Family name Kotaranin is present in five countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.