In Croatia, Guštović families are Croats (from Sveti Ivan Zelina ). In the past century, relatively most of Croatian residents bearing this family name were born in Sveti Ivan Zelina and Zagreb.
Prevalence
About 30 people with faimily name Guštović live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in only two Croatian places: in Gornje Psarjevo (25) and Bunjak (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.