In Croatia, Grgan families are almost entirely Croats (from Beli Manastir area ), very rarely Hungarians (also from Beli Manastir area ). In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec area and in Beli Manastir area.
Prevalence
About 50 people with faimily name Grgan live in Croatia today, in 18 households. There were 40 of them in the middle of the past century, and their number increased by 30 percent. They are located in 6 Croatian counties and four other places, mostly in Petlovac in Beli Manastir area (25), Zagreb (<10), Beli Manastir (<10), Cakovec (<10), and in Gorican in Cakovec area (<5).
Outside Croatia
Family name Grgan (including: Gergan , Gergian and Gergyan ) is present in 11 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.