In Croatia, Heniz families are Croats (from Slatina ). In the past century, relatively most of Croatian residents bearing this family name were born in Slatina.
Prevalence
About 10 people with faimily name Heniz live in Croatia today, in four households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two naselja i to in Kozice (<10) and Slatina (<5).
Outside Croatia
Family name Heniz is present in four countries on three continents. The family name "Heniz " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1927 in source Emigration Commission Zagreb.