In Croatia, Gregoran families are almost entirely Croats (from Prelog area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Prelog area.
Prevalence
About 50 people with faimily name Gregoran live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 7 cities and 6 other places, mostly in Zagreb (20), Beli Manastir (<10), Rijeka (<10), Celine (<10), and in Sisak (<5).
Outside Croatia
Family name Gregoran is present in five countries on three continents.