Mary is known by many different titles (Blessed Mother, Virgin, Madonna, Our Lady), epithets (Star of the Sea, Queen of Heaven, Cause of Our Joy), invocations (Theotokos, Panagia, Mother of Mercy) and other names (Our Lady of Loreto, Our Lady of Guadalupe).
All of these titles refer to the same individual named Mary, the mother of Jesus Christ (in the New Testament) and are used variably by Roman Catholics, Eastern Orthodox, Oriental Orthodox, and some Anglicans. (Note: Mary Magdalene, Mary of Clopas, and Mary Salome are different individuals from Mary, mother of Jesus.)
Many of the titles given to Mary are dogmatic in nature. Many other titles are poetic or allegorical and have lesser or no canonical status, but which form part of popular piety, with varying degrees of acceptance by the clergy. Yet more titles refer to depictions of Mary in the history of art.