In Croatia, Auer families are generally Croats (from Koprivnica area ), rarely Germans (from Crikvenica ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 20 people with faimily name Auer live in Croatia today, in 11 households. There were 80 of them in the middle of the past century, and their number decreased significantly. They are located in 6 Croatian counties, in 7 cities and two other places, mostly in Split (<5), Koprivnica (<5), Zagreb (<5), Crikvenica (<5), and in Vinica Breg in Ivanec area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.