Yes, Andrew Theby is the same Andreas Theby who married Anna Maria Korn. I am related to his daughter Christina (gg-grandmother).
As the family story goes, he was a pretty severe drinker who ended up destitute and alone...I'm guessing alone the County Poor Farm. The information I have for him says he was born Nov 5, 1809 in Trectingshausen, Rhine, Germany.
My father has a family bible with stories about him. Let me know if you're still interested.