In Croatia, Grgičak families are Croats (from Karlovac ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac.
Prevalence
About 10 people with faimily name Grgičak live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only two naselja i to in Karlovac (<10) and Priselci (<5).
Outside Croatia
Family name Grgičak is present in three countries on two continents. The family name "Grgicak " is used by small number of people in the United States and small number in Canada.