In Croatia, Dietrich families are predominantly Croats (from the Island of Losinj ), rarely Germans (from Osijek ).
Prevalence
Only a few people with faimily name Dietrich live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Osijek (<5) and Mali Losinj on the Island of Losinj (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.