In Croatia, Najdek families are almost entirely Croats (from Bosnian Posavina ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Zagreb. In Čelinovac in Bosanian Posavina every second inhabitant had the family name Najdek.
Prevalence
About 30 people with faimily name Najdek live in Croatia today, in 12 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in 7 Croatian counties, in 7 cities and threee other places, mostly in Zagreb (10), Daruvar (<5), Porec (<5), Varazdin (<5), and in Dugo Selo (<5).