In Croatia, Rujnić families are Croats (from Djurdjevac area ). In the past century, relatively most of Croatian residents bearing this family name were born in Djurdjevac area and in Bjelovar.
Prevalence
About 20 people with faimily name Rujnić live in Croatia today, in 9 households. There were 40 of them in the middle of the past century, and their number halved. They are located in only five naselja i to in Ferdinandovac in Djurdjevac area (20), Zagreb (<5), Koprivnica (<5), Samobor (<5), and in Dinjevac in Djurdjevac area (<5).
Outside Croatia
Family name Rujnić is present in three countries on three continents.