In Croatia, Katolik families are Croats (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Derventa area) and in Pleternica area.
Prevalence
About 10 people with faimily name Katolik live in Croatia today, in 8 households. They are located in only four naselja i to in Slavonski Brod (<10), Zagreb (<5), Dugo Selo (<5), and in Sesvete (<5).