Which William Shakespeare's play has reference to the Fairy Queen from folklore who was believed to rule the fairies?
Fairy Queen: The Fairy Queen or Queen of the Fairies was a figure from folklore who was believed to rule the fairies. Fairy Queen:  Based on Shakespeare's influence, in English-speaking cultures she is often named Titania or Mab. Queen Mab: Queen Mab (pronunciation: "M/ă/v") is a fairy referred to in William Shakespeare's play "Romeo and Juliet", where "she is the fairies' midwife."
Romeo and Juliet