Dr. Walter, I said her position as queen of Heaven has scriptural basis. I said nothing about her title, which indeed has roots in Mesopotamian lore. Queen of Heaven, however, seems an appropriate title for Mary’s position.
Beginning with Solomon, we see that the queen was not the king’s wife but was his mother. Bathsheba reigned with Solomon on a throne at his side. The king’s mother even enjoyed the title of “queen mother.” See 1 Kings 15:13; 2 Kings 10:13; 2 Chronicles 15:16. As you read through the chronology of the kings in the Davidic dynasty, you will see that the king's mother was always named along with the king.
Jesus Christ is the culmination of the Davidic kingdom and He reigns in Heaven. Therefore, it would only be fitting and natural for His mother to reign along with Him as the queen mother. This is the basis of the Catholic doctrine concerning Mary as Queen of Heaven. She is also sometimes called Queen of Angels and Saints. Therefore, Mary’s position is not a rip off of Mesopotamian lore, but rather has a scriptural foundation.