In Croatia, Hađak families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
About 20 people with faimily name Hađak live in Croatia today, in 10 households. There were 70 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Zagreb (20), Pitomaca in Djurdjevac area (<5), Zapresic (<5), and in Brezovac (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.