In Croatia, Steinbruckner families are Croats (from Valpovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Valpovo area and in Osijek.
Prevalence
About 20 people with faimily name Steinbruckner live in Croatia today, in 7 households. They are only located in in one Croatian city and another small place , mostly in Petrijevci in Valpovo area (25) and Osijek (<5).
Outside Croatia
Family name Steinbruckner is present in 9 countries worldwide. The family name "Steinbruckner " is used by some 100 people in the United States , small number in Germany , and small number of people in the Netherlands.
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.