In Croatia, Žvanja families are Croats (from Labin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin and Rijeka.
Prevalence
About 20 people with faimily name Žvanja live in Croatia today, in 10 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian counties, two cities and four other places, mostly in Kozljak in Labin area (10), Rijeka (<10), Vinez (<5), Potpican in Labin area (<5), and in Grobnik in Rijeka area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.