In Croatia, Kuštan families are almost entirely Croats (from Bjelovar area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Cazma area.
Prevalence
About 30 people with faimily name Kuštan live in Croatia today, in 20 households. There were 110 of them in the middle of the past century, and their number decreased significantly. They are located and 12 other Croatian places, mostly in Zagreb (<10), Medjuraca in Bjelovar area (<10), Klokovec in Krapina area (<5), and in Ivanska (<5) and Djurdjic (<5) in Bjelovar area.
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.