Grubišić families are usually Croats and they are mostly from Bosnian Posavina. According to some sources they are from Sinj, very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Split and in Bosanian Posavina (Derventa area). In Gradac in Bosanian Posavina every sixth inhabitant had the family name Grubišić.
Prevalence
About 2900 people with faimily name Grubišić live in Croatia today, in 1200 households. There were 1900 of them in the middle of the past century, and their number increased by 50 percent. They are located in almost all Croatian counties, in 77 cities and 179 other places, mostly in Zagreb (585), Split (465), Sibenik (270), Solin (110), and in Slavonski Brod (105).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over fifty times, the first time 1716 in source Catholic Church Parish Records.