Ajduk families are Croats and they are mostly from Opuzen. In the past century, relatively most of Croatian residents bearing this family name were born in Imotsko and Vrgorac. In Kamenmost in Imotski area every twentieth inhabitant had the family name Ajduk.
Prevalence
About 200 people with faimily name Ajduk live in Croatia today, in 80 households. There were 140 of them in the middle of the past century, and their number increased by 40 percent. They are located in 10 Croatian counties, in 15 cities and 12 other places, mostly in Kamenmost in Imotski area (55), Opuzen (35), Zagreb (15), Donji Vinjani (15), and in Imotski (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.