In Croatia, Petsch families are Croats (from Porec ).
Prevalence
Only a few people with faimily name Petsch live in Croatia today, in one household only. They are located in two Croatian cities only, in Split (<5) and Porec (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.