In Croatia, Kljukovnica families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Duga Resa area and in Karlovac.
Prevalence
About 10 people with faimily name Kljukovnica live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Radonja in Duga Resa area (15), Zagreb (<5), and in Vojisnica (<5) and Vojnic (<5) in Duga Resa area.
Outside Croatia
Family name Kljukovnica is present in two countries.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.