I've managed to trace my Stringfellow ancestors back as far as George Stringfellow b.1816 living in Clinton Co during the 1850 census. He married Leah Kepler. It stops here, but I've found other Stringfellows in nearby (Mifflin, Chester) counties.
Looking for any links between George (above) and the following:
Sam Stringfellow b.1804 of Goshen, Mifflin Co. Jesse or George Stringfellow of Uwchland, Chester Co c.1790.