In Croatia, Jadanec families are almost entirely Croats (from Dugo Selo area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Dugo Selo area. In Kusanovec in Dugo Selo area every third inhabitant had the family name Jadanec.
Prevalence
About 50 people with faimily name Jadanec live in Croatia today, in 30 households. There were 100 of them in the middle of the past century, and their number halved. They are located in threee Croatian counties, in 6 cities and four other places, mostly in Zagreb (25), Dugo Selo (<10), Djurdjevac (<10), Novigrad Podravski in Djurdjevac area (<5), and in Kusanovec in Dugo Selo area (<5).
Outside Croatia
Family name Jadanec is present in two countries on two continents. The family name "Jadanec " is used by few people in the United States.
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.