I am curious about your posting and hope you still check this message page.
Ihave a Jacob Hummel that married a Caroline Billheimer.She was born 1826.
I am always searching for the info to fill in some of my research. My Langenbach history goes back to George Paul Langenbach (possible line) who came from Germany.He was born in abt. 1753 and had a son Michael born abt 1780. As you can see there are lots of holes.
Michael married Catherine Miller in 1801 in PA.They had 9 children. Does any of this fit your Langenbach research?