Hajduk families are usually Croats and they are mostly from Novi Marof , barely Rusyns (from Vukovar ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Zagreb.
Prevalence
About 440 people with faimily name Hajduk live in Croatia today, in 170 households. There were 520 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 36 cities and 59 other places, mostly in Zagreb (55), Novi Marof (30), Lekenik in Petrinja area (25), Varazdin (25), and in Tuhovec (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.