In Croatia, Kust families are Croats (from Djakovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo area and in Vukovar.
Prevalence
About 10 people with faimily name Kust live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number halved. They are located in four Croatian counties, four cities and two other places, mostly in Djakovo (<5), Vrbovec (<5), Gasinci in Djakovo area (<5), Koprivnica (<5), and in Satnica Djakovacka in Djakovo area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.