In Croatia, Grijak families are mainly Croats (from Karlovac ), less frequently Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Zagreb.
Prevalence
About 40 people with faimily name Grijak live in Croatia today, in 20 households. There were 90 of them in the middle of the past century, and their number decreased significantly. They are located in 8 Croatian counties, in 6 cities and 5 other places, mostly in Zagreb (15), Karlovac (15), Jastrebarsko (10), Rijeka (<5), and in Sesvete (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.