Not a surprise to me. A former student of mine wrote a doctoral dissertation that involved going through Martin Luther’s works to see everything that he had to say about Mary.
Basically, the only Catholic title that he denied her was Queen of Heaven, because he thought that was too close to the forbidden name of Ishtar in the O.T. Of course, a Catholic would say that Ishtar was a false Queen of Heaven, but Mary is the true one.
This arose because in Paradise Regained, John Milton—an intense Puritan if their was one—presents Mary in a most respectful way. In fact, he honors her more in that late poem than he does the Apostles. Most Miltonists found this bewildering, but in point of fact Calvin, as well as Luther, speaks highly of Mary and treats her with honor and respect. It was a later Protestant phenomenon to let hatred of Rome degrade respect for the Mother of God—and ignore what the Bible actually says about Mary.
Interesting, I hadn’t realized the Milton connection. Dante was my favorite, Milton bored me.