Hello,
I saw your post and wished to respond. I too am trying to research the family of Lewis W. Raudabaugh (or other spellings) and Mary Ann Keller. Lewis is my 3rd great grandfather. I'm fairly confident in my research up to the point of Lewis. Although I haven't been able to find proof of Mary Ann's maiden name being Keller (i.e. marriage records, etc.) and haven't been able to discover the parents of Lewis or Mary Ann. Seem to have hit a dead end at this point. Would love to connect and compare notes if you are still working on this. From what you wrote it appears you might have information about the Keller family and how it intersects with the Raudabaugh family. My 2nd great grandfather is George Washington Raudabaugh (son of Lewis and Mary Ann).
I look forward to hearing from you.
Kimberley