In Croatia, Schlosser families are generally Croats (from Vukovar ), very rarely Albanians (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Vukovar and Zagreb.
Prevalence
About 20 people with faimily name Schlosser live in Croatia today, in 8 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in four Croatian cities only: in Zagreb (15), Nova Gradiska (<5), Osijek (<5), and in Novi Vinodolski (<5).
Outside Croatia
Family name Schlosser is present in 51 countries worldwide. The family name "Schlosser " is used by some 20000 people in Germany , about 10000 in the United States , and some 3000 people in Brazil.
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.