The first Rudolph I have is Leopold Rudolph born 1772 in Austria. His wife's name was Anna Catharina born in Austria. Know of a son named John Caspar. He was born 1788 in Austria also. There were likely more children. I did find Leopold and wife Anna Catharina with children Anna Elisabeth, Caspar, Anna Maria, and Maria Catharina listed in the Pennsylvania Foreign Oaths of Allegiance. They came to this country around 1800. We do have a rumor in our family that they were also part of the Austrian royality. But nothing has been found yet to comfirm this. If any of this makes a connection with you let me know.