In Croatia, Kaćunko families are almost entirely Croats (from Omis ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Omis.
Prevalence
About 80 people with faimily name Kaćunko live in Croatia today, in 30 households. There were 30 of them in the middle of the past century, and their number more than doubled. They are only located in in 8 Croatian cities and four other places, mostly in Donji Dolac (35), Split (15), Solin (10), Knin (<10), and in Zagreb (<10).
Outside Croatia
Family name Kaćunko (including: Kacunko , Kachuenko ) is present in 8 countries on two continents.
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.