In this paper, we begin by analyzing the greeting addressed by the angel Gabriel to the young woman Mary: “Χαῖρε, κεχαριτωμένη” (Luke 1:28), examining the New Testament designation of Mary, the Mother of God, as κεχαριτωμένη ‒ translated variously as “full of grace,” “highly favored,” or “rejoiced one.” The onomastic transformation of Mary into κεχαριτωμένη constitutes a central theological, ontological, and poetic moment in Luke’s shaping of the Annunciation narrative. Following the Jewish tradition of naming, where names always carry particular ‒ often religious ‒ meaning, the angel’s naming of Mary as κεχαριτωμένη functions as a specific onomastic qualification of Christ’s bodily mother. Deliberately given, this designation becomes Mary’s new name, that is, the name by which a new relationship between God and humanity is established. It thus signifies the fullness of grace bestowed upon the Mother of Christ as a sign of her being chosen for the divine salvific plan, rendering Mary one of the key and indispensable eschatological-soteriological figures of Christianity. The proposed study, therefore, explores ‒ not Mary’s personal name ‒ but the earliest extant and purposefully employed theotokonym, which, as will be demonstrated, plays a decisive role in shaping Mary’s theological as well as poetic image.