'Descendant' in the Bible

During the reign of Herod king of Judea, there lived a priest named Zechariah who belonged to the priestly division of Abijah, and he had a wife named Elizabeth, who was a descendant of Aaron.

to a virgin engaged to a man whose name was Joseph, a descendant of David, and the virgin's name was Mary.

Don't the scriptures say that the Christ is a descendant of David and comes from Bethlehem, the village where David lived?"

concerning his Son who was a descendant of David with reference to the flesh,

So I ask, God has not rejected his people, has he? Absolutely not! For I too am an Israelite, a descendant of Abraham, from the tribe of Benjamin.

Now the promises were spoken to Abraham and to his descendant. Scripture does not say, "and to the descendants," referring to many, but "and to your descendant," referring to one, who is Christ.

Why then was the law given? It was added because of transgressions, until the arrival of the descendant to whom the promise had been made. It was administered through angels by an intermediary.

Remember Jesus Christ, raised from the dead, a descendant of David; such is my gospel,

"I, Jesus, have sent my angel to testify to you about these things for the churches. I am the root and the descendant of David, the bright morning star!"