Page 188 of Ortsfamilienbuch lists Elisabeth Antonia born 12 June 1852 to Matthäus und Sophie (Willwerth).
Siblings:
Johan
Magdelena
Joseph
Franz
Michael
Magdelena

Hmn; this took some ingenuity. There is no reference under her name to a marriage. Nor was there reference to Peter Joseph Mayer in any family of the correct era. On a hunch, I looked for variants of the Mayer name and found a Peter Joseph Maier, b Feb 11 1851 to Johannes Maier & Theresia (Kengelbach) with the note that Peter went to Amerika in 1869 and there married Elisabeth Antonia Fabry in 1866 in Salinas, California. When I prowled Salinas 84 years later, they could have been living, but the book doesn't say they lived there for life. (I'm 84 years old now.)
I hope that Janet or Iris has another copy of the book. I've not heard from Iris yet this Christmas season.