In Croatia, Kirchbaum families are Croats (from Varazdin ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin.
Prevalence
About 10 people with faimily name Kirchbaum live in Croatia today, in 6 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in one Croatian city only, in Varazdin (10).
Outside Croatia
Family name Kirchbaum is present in four countries on two continents. The family name "Kirchbaum " is used by small number of people in the United States and small number in Germany.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.