In Croatia, Hader families are generally Croats (from Virovitica area ), rarely Hungarians (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Virovitica and Zagreb. In Čista Mlaka in Dugo Selo area every ninth inhabitant had the family name Hader.
Prevalence
About 40 people with faimily name Hader live in Croatia today, in 20 households. There were 40 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties, in 7 cities and 6 other places, mostly in Spisic Bukovica in Virovitica area (15), Zagreb (10), Kastav (<10), Novo Cice (<10), and in Viletinec (<10).