Gruić families are predominantly Croats and they are mostly from Trogir , less frequently Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Trogir.
Prevalence
About 120 people with faimily name Gruić live in Croatia today, in 50 households. There were 150 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 15 cities and 9 other places, mostly in Trogir (30), Zagreb (20), Split (20), Trnjanski Kuti in Slavonski Brod area (10), and in Pozega (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1749 in source 18th Century Census.