Kušer families are Croats and they are mostly from Krapina. In the past century, relatively most of Croatian residents bearing this family name were born in Krapina and Zagreb.
Prevalence
About 100 people with faimily name Kušer live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number increased by 10 percent. They are located in 8 Croatian counties, in 13 cities and 12 other places, mostly in Zagreb (20), Lepajci (15), Kutina (10), Zapresic (<10), and in Strmec in Samobor area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.