Grgac families are Croats and they are mostly from Oroslavje area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Oroslavje area. In Novaki Bistranski in Oroslavje area every tenth inhabitant had the family name Grgac.
Prevalence
About 190 people with faimily name Grgac live in Croatia today, in 80 households. There were 250 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 10 Croatian counties, in 13 cities and 17 other places, mostly in Zagreb (55), in Gornja Bistra (20) and Donja Bistra (15) in Oroslavje area, Sesvete (<10), and in Zapresic (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1923 in source Emigration Commission Zagreb.