The Greek name Elisabet is the transliteration of Hebrew Elisheva — "God is my oath" or "my God is abundance." Elizabeth was the wife of Zechariah and the mother of John the Baptist (Luke 1). She was a descendant of Aaron, barren until old age, and miraculously conceived John. She was also the relative (syggenis) of Mary, the mother of Jesus.
Elisabet (God is my oath) embodies the theology of covenant faithfulness in the face of seeming impossibility. Her barrenness recalled Sarah's; her miraculous conception recalled Hannah's. God's "oath" (sheva) is precisely what makes the impossible possible — He is bound by His own character to fulfill His promises. When Mary visits Elizabeth, the unborn John leaps in the womb — the herald recognizes the King before either is born. Elizabeth's Spirit-filled blessing (Luke 1:42–45) makes her one of the NT's first prophets of the incarnation.