Hi Robert, sorry to bump into this conversation, but we are currently researching my wife's ancestors and we believe we have a connection here to Anton Stowasser. In the late 19th century, we do know that there was marriages between the Rölz and Stowasser family with later resulted in that the music insrument factory that used to belong to the Stowasser family somehow got passed down to Hans Rölz.
We know for example that Josef Rölz Reiel from Grossengrün (Krajkova today) married Julie Stowasser from Graslitz (Kraslice today) and they then had Johann Friedrich Rölz Stowasser on 26th Dec 1884 in Graslitz.
Have you found any connection from the Stowasser Family and the Rölz Family in your research?
Thanks a bunch for any info you might have.