We are talking about different but related Mathias Kershner's.
Johann Conrad Kershner b. 1744 must be your line?He is the eldest of 13 children.My line is not through his brother Mathias who was born 1751 and died in 1833, but through his younger brother Johann George Kershner born 30 Sep 1760.
Johann George Kershner m. Catharina Sara Faust and had eight children:Mathias, George, Cora, John, Abraham, David, Peter and Martin.I descend from the eldest Mathias, b. 1787 and died ca 1817.
All these Mathias's were named for Anna Catherine Beck's father Matthias Beck 1694-1769.
Most of my information comes from Bob Kershner of New Amsterdam, Missouri and from the Kershner Family Association.
I look forward to corresponding to you, and learning more on your line. Sorry, but my email to you was returned/rejected.