Since Dr. John Vanstory is listed on the census as a German Doctor and farmer, im guessing his parents came to America the same time as Catherine Shoemaker's. And since the spelling of their last name changed once in America, my guess is so did the name Vanstory. But so far I've not been able to find anything on the Vanstory name that far back. My maiden name is Vanstory and I know the name has changed spelling several times... Van Story, Vanstore, Von Storre... If you find anything please let me know.