If Jesus is the son of God then why bother listing his genealogy?
Under the Old Covenant, all births had to be recorded because the Hebrew nation was tribal. Only the tribe of Levite could serve as priests in the temple, and only the Levites who were from Aarons lineage could be appointed as High Priests.
These records were important to further prove that Jesus is from the tribe of Judah, not a Levite and that his bloodline is not tainted. He had to fulfil every messianic prophecy to be legitimate for Messiahship. He could not have failed any prophetic requirement.
THE MESSIAH HAD TO COME FROM THE TRIBE OF JUDAH. He would come to claim his sceptre and fulfil Genesis 1:26 - JUDAH / A RULER - “Seed of Judah” - Genesis 49:10, Isaiah 11:1, 10, Numbers 24:17b
HE WOULD BE SWORN IN BY AN OATH TO REINSTATE THE ORDER OF MELCHIZEDEK OR THE FIRST-BORN PRIESTHOOD THAT WAS LOST - Psalms 110:4, Ezekiel 40:46, 43:19, 44:15, 48:11, Hebrews 7:21
MUST BE BORN IN BETHLEHEM (Ephrathah, singular. Ephrayim, plural) - He is the Star of Bethlehem Micah 5:2, Matthew 2:1, Luke 2:4-6 - Yehoshua, the son of Nun, the Ephraimite.
THE MESSIAH COULD NOT HAVE A CURSE IN HIS LINEAGE - Joseph could not be Jesus biological father. Joseph was biologically born of Jacob who was from Jeconiah’s lineage (The cursed king who burnt the holy scroll of Yah) - Jeremiah 36:20-26. Joseph was legally from Eli and this could make him the father of Jesus. Legality takes precedence over genealogy. This means that legally Joseph is NOT under the curse of Jeconiah (Jehoiachin or Coniah). He can be the legal father of Jesus but not his biological father. Joseph was born from a “Yibbum” or levirate marriage arrangement.
YIBBUM MEANS LEVIRATE MARRIAGE
The son of Heli (Yibbum)
Mary must have been of the same tribe and family as Joseph, according to the law (Num 36:8). Isa 11:1 implies that Messiah was the seed of David by natural as well as legal descent. Probably Matthan of Matthew is the Matthat of Luke, and Jacob and Heli were brothers; and Heli's son Joseph, and Jacob's daughter Mary, first cousins. Joseph, as male heir of his uncle Jacob, who had only one child, Mary, would marry her according to the law (Num 36:8). (Fausset)
"Julianus Augustus in this place attacks the evangelists on the ground of discrepancy: Matthew calls Joseph the son of Jacob, whereas Luke calls him the son of Heli! Had Julian been better acquainted with the modes of speech of the Jews, he would have seen that one evangelist gives the natural and the other the legal pedigree of Joseph." (Cyclopedia)
- The son of Melchi (Yibbum)
It is to the effect that Matthan, the third in the list from Joseph in Matthew’s genealogy, sand Melchi, the third in Luke’s list, married successively the same womam, by whom the former begat Jacob, and the latter Heli. Heli dying without issue, bis maternal brother took his widow to wife, by whom he had Joseph, who, according to law (Deu 25:6), was registered by Luke as the son of Heli, though naturally the son of Jacob, as Matthew records him. This is the explanation which was generally admitted by Eusebius, Nazianzen, the writer of Ad orthodoxos, and others, for ages. (Cyclopedia)
- Judah begot Perez and Zerah by Tamar (Pretended to be a prostitute to
preserve her inheritance - Yibbum)
Tamar and Judah - Genesis 38:1-30
- Nahshon begot Salmon (Married Rahab the prostitute. He saved her and
gave her an inheritance)
(4.) It is again asked, if it be, as Matthew states, that Salmon, son of Naason, prince of Israel, had married so remarkable a person as Rahab, how then comes it that such a circumstance is not noticed in the book of Joshua? This objection will have no force if we remember that this book, full as it is in describing the partition of Canaan among the several tribes, is yet very silent concerning the exploits, and even names, of the subordinate leaders of Israel. There is nothing, therefore, surprising in the circumstance that it should pass over in total silence Salmon’s marriage with Rahab. Had the matter in question been the espousal of Rahab by Joshua himself, the presumption against its truth would be very different. Indeed Kimchi, in this Commentary on the Book of Joshua, adduces a tradition to this effect, taken from the Babylonian Talmud. Every consideration, moreover, of a chronological character is in favor of the circumstance of the son of Naason, born to him in the wilderness being married to Rahab. SEE RAHAB. (Cyclopedia)
- Boaz begot Obed by Ruth (Boaz turned a Moabite into a believer and
gave her an inheritance - Yibbum)
After the nearest redeemer had thus renounced the right of redemption with all legal formality, Boaz said to the elders and all the (rest of the) people, “Ye are witnesses this day, that I have acquired this day all that belonged to Elimelech, and to Mahlon and Chilion (i.e., the field of Elimelech, which was the rightful inheritance of his sons Mahlon and Chilion), at the hand of Naomi; and also Ruth the Moabitess, the wife of Mahlon, I have acquired as my wife, to raise up the name of the deceased upon his inheritance, that the name of the deceased may not be cut off among his brethren and from the gate of his people” (i.e., from his native town Bethlehem; cf. Rth 3:11). On the fact itself, see the introduction to Ruth 3; also the remarks on the Levirate marriages at Deu 25:5. (Keil & Delitzsch)
- Bathsheba the wife of Uriah and of David (the adulterer is purified
by giving birth to a Son of the SEED)
Laws of Yoledet - A woman is purified after child birth.
As soon as a child was born it was washed, and rubbed with salt (Eze 16:4), and then swathed with bandages (Job 38:9; Luk 2:7, Luk 2:12). A Hebrew mother remained forty days in seclusion after the birth of a son, and after the birth of a daughter double that number of days. At the close of that period she entered into the tabernacle or temple and offered up a sacrifice of purification (Lev 12:1-8; Luk 2:22). A son was circumcised on the eighth day after his birth, being thereby consecrated to God (Gen 17:10-12; compare Rom 4:11). Seasons of misfortune are likened to the pains of a woman in travail, and seasons of prosperity to the joy that succeeds child-birth (Isa 13:8; Jer 4:31; Joh 16:21, Joh 16:22). The natural birth is referred to as the emblem of the new birth (Joh 3:3-8; Gal 6:15; Tit 3:5, etc.). (Easton)
Matthan, descended from Solomon, begat Jacob. Matthan dying, Melchi, descended from Nathan, begat Heli by the same wife. Therefore Heli and Jacob are uterine brothers. Heli dying childless, Jacob raised up seed to him and begat Joseph, his own son by nature, but the son of Heli by law. Thus Joseph was the son of both. ([Elucidation I.]) (Ante-Nicene Fathers - Africanus - Extant Writings Part 1)