In Croatia, Haas families are predominantly Croats (from Djakovo ), very rarely Bosniaks, and . In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo and Osijek.
Prevalence
About 10 people with faimily name Haas live in Croatia today, in 6 households. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in 6 Croatian counties, in 8 cities and another small place , mostly in Varazdin (<5), Djakovo (<5), Zagreb (<5), Split (<5), and in Rijeka (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.