In Croatia, Haniž families are Croats (from Kastav ). In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar area.
Prevalence
Only a few people with faimily name Haniž live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in one Croatian city only, in Kastav (<5).