In Croatia, Zadrija families are Croats (from Vrbovec ). In the past century, relatively most of Croatian residents bearing this family name were born in Vrbovec and Bakar. In Vrhovec in Vrbovec every eighth inhabitant had the family name Zadrija.
Prevalence
About 30 people with faimily name Zadrija live in Croatia today, in 11 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, four cities and 6 other places, mostly in Vrhovec (<10), Lonjica (<10), Dulepska (<5), Zagreb (<5), and in Vrbovec (<5).
Outside Croatia
Family name Zadrija is present in this form only in Croatia.
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.