Last name unclear - Schwerz, Scherer, Scheerer, etc. It shows most legibly on the 1822 birth/baptism record of Catherine Elisabethe, the illegitimate daughter of Johann David Schweikert and Christiana, as "Scheerer" as well as on the1826 baptism record of her son David.
The marriage record of her daughter Catherine Elisabethe notes that Catherine's mother, Christiana nee Scheerer, is deceased.