In Croatia, Pernjak families are almost entirely Croats (from the Island of Pag ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Koprivnica.
Prevalence
About 50 people with faimily name Pernjak live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number decreased by 10 percent. They are only located in in 8 Croatian cities and 7 other places, mostly in Koprivnica (15), Krizevci (<10), Delnice (<10), Viskovo in Rijeka area (<10), and in Zagreb (<10).
Outside Croatia
Family name Pernjak (including: Pernyak , Perniak ) is present in 11 countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.