Kuljak families are Croats and they are mostly from Zlatar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zlatar area.
Prevalence
About 80 people with faimily name Kuljak live in Croatia today, in 30 households. There were 80 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties and 10 other places, mostly in Zagreb (20), in Konjscina (15) and Susobreg (<10) in Zlatar area, Zlatar-Bistrica in Oroslavje area (<10), and in Gornji Fodrovec in Krizevci area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.