Grandmother was the historian in the family but she passed away recently and he is taking the reigns now.
According to Christopher: Jacob was born as Jacob Andreas Knorr in 1798 in Grossgrabe, Mühlhausen, Sachsen, Prussia.
He married Wilhelmine Magdalena Nicolai.
Jacob had 7 children that he knows of: Anna, Georg, Andrew, Johann, Catharina, Amelia, and Christopher. They seem to have been born in that order, starting in 1830, and seperated by two years like clockwork.
Part of this fits - but there is still doubt. Here are some of the census and other info for him: