In Croatia, Koluvija families are predominantly Serbs, rarely Croats (also from Knin ). In the past century, relatively most of Croatian residents bearing this family name were born in Knin and Zagreb.
Prevalence
About 10 people with faimily name Koluvija live in Croatia today, in five households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Knin (15).
Outside Croatia
Family name Koluvija is present in four countries on two continents.