Rebecca Bortner, daughter of Jacob Bortner and Catharine Snyder was born in 1818, wife of Levi Bahn, she was still living (when the book was published). [1]
A biosketch of Levi Bahn reports [2]:
Levi Bahn, son of John and Polly Bahn, nee Schwartz, of Springfield Townsliip, was born March 22, 1820, in Shrewsbury Township. He was reared on his father's farm until his nineteenth year, then went to his trade of carpenter with John N. Miller, of Shrewsbury Township, and followed his trade since that date, except four years when engaged in milling. He built the mill which Henry M. Bortner now owns and operates. .January 23, 1843, he married Margaret Bortner, daughter of Jacob and Catherine (Snyder) Bortner, of Codorus Township. Twelve children have been born to this union: Cassie, deceased; Rebecca and Levi, twins; Louis, Elizabeth; Matilda, deceased; John, Catharine, Sarah .J., Louisa, Jacob and William H. Mr. Bahn has been the leading builder of Codorus Township for the past forty years, nearly all the large barns and dwellings having been erected by him. The first meeting house ever built in Glen Rock was put up by Mr. Bahn. He is descended from one of the old families of the township. Mr. Bahn is a member of Fishel's (Lutheran) Church. His grandfather, Frederick Bahn, was only four years old when he came to York County.
[1] George R. Prowell, History of York County Pennsylvania, Volume 2 (Beers, 1907), 225, [HathiTrust], [InternetArchive].
[2] John Gibson, ed., History of York County Pennsylvania, Part II Biographical Sketches (Chicago: F. A. Battey Publishing, 1886), 92, [InternetArchive], [GoogleBooks].