In Croatia, Hriljac families are Croats (from the Island of Krk ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and on the Island of Krk.
Prevalence
About 20 people with faimily name Hriljac live in Croatia today, in 8 households. There were 40 of them in the middle of the past century, and their number halved. They are only located in threee Croatian cities and four other places, mostly in Krk (10) and Vrbnik (<5) on the Island of Krk, Hreljin (<5), Dramalj (<5), and in Risika on the Island of Krk (<5).
Outside Croatia
Family name Hriljac is present in 8 countries on three continents. The family name "Hriljac " 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.