From the Formula of Concord:Now I can only speak from what I have heard and been around. I cannot speak for all of Protestantism. I was raised Baptist and I never heard Mary called anything other than Mary. They state that she was a virgin at the time Christ was born but do not hold to the PV. The only time she was every mentioned was during Christmas time. She was just Mary to them and nothing more. But see this view is coming from a view that although God blessed Mary to carry His Son on earth, she was simply just like any other woman.
JonOn account of this personal union and communion of the natures, Mary, the most blessed Virgin, bore not a mere man, but, as the angel [Gabriel] testifies, such a man as is truly the Son of the most high God, who showed His divine majesty even in His mother’s womb, inasmuch as He was born of a virgin, with her virginity inviolate. **Therefore she is truly the mother of God, and nevertheless remained a virgin. **