In Croatia, Gruja families are Croats (from Sibenik area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and in Sibenik area.
Prevalence
About 50 people with faimily name Gruja live in Croatia today, in 30 households. They are located in 6 Croatian counties, in 6 cities and 5 other places, mostly in Velika Gorica (10), Zagreb (<10), Sibenik (<10), Split (<10), and in Siroke in Sibenik area (<10).