Jody... My database info on Andrew is somewhat sketchy, but he is not the son of Hartmann. Hartmann only had one son, Hannes "John" who had 7 sons. It is from these "Seven Sons" that most of the Hunsaker in the US are descended, your Andrew being one of them.
I will be happy to do a look up on microfilm as my time allows for Andrew. Just drop me a note and let me know.