In Croatia, Cvanciger families are Croats (from Sisak area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak area and in Sisak.
Prevalence
About 20 people with faimily name Cvanciger live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in five Croatian cities only: in Sisak (10), Zagreb (<5), Bjelovar (<5), Daruvar (<5), and in Jadranovo (<5).