My Grandfather, Bernard Ressler, from Owatonna, MN, had told a story about his ancesters. They came from an area called Bohemia or Austria. The story was that there were two brothers Roessler (first names I am not sure of). In the late 1800's there was some kind of military action at home and my ggrandfather was a pacifist. He had a wife with child. He changed his name to Ressler so he, in effect, was a draft-dodger. He left Europe and came to the USA under the Ressler name, his wife followed soon there after.They settled, I believe, in Steel County, MN.
The other brother who stayed in Europe fathered a very, very famous opera singer of her time. Her name was Mdm. Ernestine (Ressler) Schumann-Heink. Could this be a relation?