In Croatia, Rustja families are predominantly Croats (from Karlovac ), rarely Slovenes (from Rijeka ), and very rarely Hungarians (from Pula ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 20 people with faimily name Rustja 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 only located in four Croatian cities and two other places, mostly in Rijeka (<10), Karlovac (<10), Sirinec in Ivanic-Grad area (<5), Zagreb (<5), and in Pula (<5).