In Croatia, Doktor families are almost entirely Croats (from Osijek area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Virovitica area.
Prevalence
About 20 people with faimily name Doktor live in Croatia today, in 8 households. There were 30 of them in the middle of the past century, and their number decreased by 30 percent. They are only located in four Croatian cities and threee other places, mostly in Zagreb (<10), Split (<10), Ivanovac in Osijek area (<10), Borova in Virovitica area (<5), and in Djurdjevac (<5).