In Croatia, Kotar families are generally Croats (from Jastrebarsko area ), very rarely Slovenes (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Jastrebarsko area. In Gornja Zdenčina in Jastrebarsko area every sixtieth inhabitant had the family name Kotar.
Prevalence
About 30 people with faimily name Kotar live in Croatia today, in 15 households. There were 10 of them in the middle of the past century, and their number tripled. They are only located in four Croatian cities and four other places, mostly in Zagreb (<10), Jastrebarsko (<10), Sukosan in Zadar area (<5), Repisce in Jastrebarsko area (<5), and in Prislin in Pregrada area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over eighty times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.