It appears there is a second name on this stone "Prosi G. Zorowas", but the information listed below it are covered with lawn debris.
On the website for the St. Stanislaus Cemetery in Millvale Pennsylvania (North Hills / Allegheny County), we find the following entry:
"Dering, Anna, Um 20 Grud 1923, 56 Lat Stara, Prosi O Zdrowas Marya, Row 25a, Stone 55, (Group)". Could this be the same Marya or Maryanna Dering?