Almost anyone in the US that has a surname, Routson, Routzong, Routzon, Routzahn or any other variation is a descendant of Johann Rauenzahner who emigrated with his family to America around 1750-1755. They entered at Philadelphia, spread west through Berks County, PA to the Gettysburg, PA-Frederick, MD area then westward to Ohio, IN, ILL, & points further westward. A very large amount of the family is represented in an exhaustive volume entitled "Rauenzahner to Routson--A Family on the move". I know of the location of two copies in the libraries at Ft Wayne, IN and Frederick, MD although there are many more out there.