In Croatia, Knapp families are generally Croats (from Middle Bosnia ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Varazdin.
Prevalence
Only a few people with faimily name Knapp live in Croatia today, in four households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Zagreb (<10) and Zapresic (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1923 in source Emigration Commission Zagreb.