In Croatia, Vapnar families are Croats (from Samobor ). In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and in Slovenia.
Prevalence
About 50 people with faimily name Vapnar live in Croatia today, in 18 households. There were 50 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, threee cities and 7 other places, mostly in Samobor (<10), Lug Samoborski (<10), Poljana (<5), Gradna (<5), and in Bregana (<5).
Outside Croatia
Family name Vapnar is present in four countries on two continents. The family name "Vapnar " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1926 in source Emigration Commission Zagreb.