Pustaj families are usually Croats and they are mostly from Jastrebarsko area , barely Hungarians. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Jastrebarsko area. In Repišće in Jastrebarsko area every fourth inhabitant had the family name Pustaj.
Prevalence
About 150 people with faimily name Pustaj live in Croatia today, in 60 households. There were 230 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 8 Croatian counties, in 10 cities and 10 other places, mostly in Repisce in Jastrebarsko area (65), Zagreb (20), Gornji Desinec (15), Jastrebarsko (<10), and in Dalj in Vinkovci area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.