In Croatia, Hazler families are almost entirely Croats (from Slunj ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Slunj and Zagreb.
Prevalence
About 30 people with faimily name Hazler live in Croatia today, in 16 households. There were 20 of them in the middle of the past century, and their number increased by 40 percent. They are located and four other Croatian places, mostly in Slunj (10), Rijeka (<5), Zagreb (<5), Fiorini in Buje area (<5), and in Osijek (<5).
Outside Croatia
Family name Hazler is present in 10 countries on three continents. The family name "Hazler " is used by small number of people in the United States , small number in Austria , and small number of people in Australia.