In Croatia, Heincz families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
Only a few people with faimily name Heincz live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Zagreb (<5) and Punta Kriza on the Island of Losinj (<5).
Outside Croatia
Family name Heincz is present in 7 countries on two continents. The family name "Heincz " is used by some 200 people in Hungary , small number in the United States , and small number of people in Germany.