Kukas families are Croats and they are mostly from Donja Stubica area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Donja Stubica area.
Prevalence
About 80 people with faimily name Kukas live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number doubled. They are located in 7 Croatian counties, in 6 cities and 8 other places, mostly in Zagreb (40), Sesvete (15), Modrovec in Donja Stubica area (<10), Andrilovec (<10), and in Dugo Selo (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.