In Croatia, Loeffler families are Croats (from Sisak ).
Prevalence
Only a few people with faimily name Loeffler live in Croatia today, in two households only. They are located in one Croatian city only, in Sisak (<5).
Outside Croatia
Family name Loeffler is present in 42 countries worldwide. The family name "Loeffler " is used by some 10000 people in the United States , about 10000 in Germany , and some 700 people in Austria.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 2007 in source Encyclopaedia of Croatian Surnames.