Answer:
Mary, the caretaker of the couple's baby, is possibly an allusion to The Virgin Mary.
Step-by-step explanation:
Mary is mentioned just once in the story "The Yellow Wallpaper" by Charlotte Perkins Gilman when the narrator of the story is being taken to isolation for her treatment and she expresses how grateful she is that the caretaker Mary is so good with her little baby. The name of the caretaker is Mary because it represents purity and goodness in Christianism.