In Croatia, Müller families are Croats (from Pozega area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Pozega area.
Prevalence
Only a few people with faimily name Müller live in Croatia today, in two households only. There were 120 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Zagreb (<5) and Vinkovci (<5).
Outside Croatia
Family name Müller is present in 67 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over a hundred times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.