In Croatia, Čukac families are almost entirely Croats (from Klanjec area ), barely Serbs, and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Klanjec.
Prevalence
About 60 people with faimily name Čukac live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 6 Croatian counties and 5 other places, mostly in Zagreb (25), Klanjec (10), Sesvete (<10), Velika Gorica (<5), and in Orehovica in Cakovec area (<5).
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.