Grbelja families are Croats and they are mostly from Sibenik. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and in Backa, Vojvodina.
Prevalence
About 100 people with faimily name Grbelja live in Croatia today, in 50 households. There were 100 of them in the middle of the past century, and their number remains constant. They are only located in in 8 Croatian cities and 6 other places, mostly in Sibenik (20), Split (15), Zaton (15), Zagreb (10), and in Vodice (10).
Outside Croatia
Family name Grbelja is present in five countries on three continents. The family name "Grbelja " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.