In Croatia, Hatz families are Croats (from Zlatar area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zlatar area and in Bjelovar.
Prevalence
About 20 people with faimily name Hatz live in Croatia today, in 14 households. There were 40 of them in the middle of the past century, and their number halved. They are located in 6 Croatian counties and four other places, mostly in Zagreb (<10), Krapinica in Zlatar area (<10), Petrinja (<5), Velika Pisanica in Grubisno Polje area (<5), and in Zavrsje Belecko (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.