In Croatia, Busch families are Croats (from the Island of Pag ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Rijeka.
Prevalence
About 10 people with faimily name Busch live in Croatia today, in 7 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in five Croatian cities only: in Zagreb (<10), Zapresic (<10), Kastel Stafilic (<5), Pag on the Island of Pag (<5), and in Kornic on the Island of Krk (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.