In Croatia, Kolouch families are Czechs by relative majority (from Daruvar ), less frequently Croats (also from Daruvar ), and very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Pakrac and in Cazma area.
Prevalence
About 30 people with faimily name Kolouch live in Croatia today, in 11 households. They are located in five Croatian cities only: in Daruvar (15), Kutina (<10), Zagreb (<5), Sisak (<5), and in Garesnica (<5).
Outside Croatia
Family name Kolouch is present in 10 countries on three continents. The family name "Kolouch " is used by some 600 people in Czech Republic , small number in Austria , and small number of people in the United States.