Sophia was the 9th child of Eva Dauer and Joseph Plenzler. I have located Sophia on the 1900 and 1910 census records for the family and have also located her baptismal certificate. It seems Sophia disappears into history!
Sophia was born April 25, 1897 and baptized May 2, 1897 in St. Anthony’s parish. Her baptismal record is transcribed below:
Ego infrastriptus baptizavi: Sophiam Plencner
Natam: 25 Aprilis
ex Joseph Plencler et Eva Dauer
Patrini fuerunt: Joannes Przybylski, Josepha Jawkowiak
I am researching this further, but I cannot locate a death record or marriage record yet for her.