Gruborović families are mainly Croats and they are mostly from Glina , often Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Glina and Zagreb. In Mali Gradac in Glina every ninth inhabitant had the family name Gruborović.
Prevalence
About 60 people with faimily name Gruborović live in Croatia today, in 30 households. There were 160 of them in the middle of the past century, and their number decreased significantly. They are located in 8 Croatian counties, in 9 cities and four other places, mostly in Mali Gradac (20), Zagreb (20), Petrinja (<10), Glina (<10), and in Oroslavje (<10).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Gruborović is present in three countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.