In Croatia, Klun families are almost entirely Croats (from Varazdin area ), barely Bosniaks (from Pula area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Pula.
Prevalence
About 50 people with faimily name Klun live in Croatia today, in 20 households. There were 100 of them in the middle of the past century, and their number halved. They are located in 9 Croatian counties, in 10 cities and 5 other places, mostly in Pula (10), Zagreb (<10), Pozega (<10), Slatina (<5), and in Petrijanec in Varazdin area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.