In Croatia, Mueller families are Croats. In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Sarajevo area) and in Tuzla Region, Bosnia (Tuzla area).
Prevalence
About 20 people with faimily name Mueller live in Croatia today, in two households only. They are only located in threee Croatian cities and threee other places, mostly in Zagreb (<10), Selce (<5), Sukosan in Zadar area (<5), Pregrada (<5), and in Oriovac in Pleternica area (<5).
Outside Croatia
Family name Mueller (including: Muelller , Mueeller ) is present in 118 countries worldwide. The family name "Mueller " is used by some 200000 people in Germany , about 100000 in the United States , and some 10000 people in Brazil.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.