In Croatia, Kuzmac families are Croats (from Petrinja area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Zagreb. In Lekenik in Petrinja area every nintieth inhabitant had the family name Kuzmac.
Prevalence
About 20 people with faimily name Kuzmac live in Croatia today, in 8 households. There were 30 of them in the middle of the past century, and their number decreased by 40 percent. They are located in threee Croatian counties, two cities and two other places, mostly in Lekenik in Petrinja area (15), Zagreb (<5), Rijeka (<5), and in Sunja in Hrvatska Kostajnica area (<5).
Outside Croatia
Family name Kuzmac is present in this form only in Croatia.
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.