Hi Sue. Joe here. As to the spelling of the last name, i found information in the Providence Public Library, Providence Rhode Island that had the name originating in Poland or eastern Austria circa early 1300's. I also remember seeing something online dating the name back to the 1100's in the Rhine River area of Germany. From there the clans spread out to the east, into Austria and Poland among other countries of eastern Europe. Most variations of the name come from that original clan as far as can be ascertained. So i think you are correct when you say the two spellings are related. i believe they are too.I can be reachesd at Jmus2u@aol.com
if you would like to exchange more thought on this matter.
PS, or whatever,,haha. Referring to the spelling.