Matthew 1:1-17 and Luke 3:23-38 provide two genealogies of Jesus Christ. Matthew's genealogy traces from Abraham forward to Christ, structured in three groups of fourteen generations (Abraham to David, David to exile, exile to Christ); its purpose is to establish Jesus as Son of David and Son of Abraham. Luke's genealogy traces backward from Jesus all the way to Adam "the son of God," emphasizing Jesus' universal humanity. The two genealogies differ significantly after David — Matthew follows Joseph's legal line through Solomon, while Luke likely follows Mary's line through Nathan (a theory supported by differences in named fathers). Together they establish Jesus' legal descent from David (Solomonic line) and blood descent (Nathanic/Marian line).
The genealogies carry massive theological weight. Four observations. (1) The promised Son of Abraham and David. From Abraham: the seed through whom all nations would be blessed (Genesis 12:3, Galatians 3:16). From David: the king whose throne would be established forever (2 Samuel 7:12-16, Isaiah 9:7). Matthew opens: "The book of the genealogy of Jesus Christ, the son of David, the son of Abraham" — and those two titles load the whole OT onto this one man. (2) Four women of questionable reputation. Matthew's genealogy names only four women before Mary: Tamar (Judah's daughter-in-law, who seduced him when he failed his levirate duty), Rahab (Canaanite prostitute), Ruth (Moabite convert), and "the wife of Uriah" (Bathsheba, taken in adultery). Matthew's deliberate inclusion of these women into the royal line signals that Jesus comes to save the compromised, the Gentiles, the socially marginalized, the scandalously sinned-against. The Messiah's line shows the nature of His mission. (3) From Adam in Luke. Luke extends the genealogy to "Adam, the son of God" — a vital theological move. Jesus is not merely Israel's Messiah; He is the Second Adam, the representative of all humanity (1 Corinthians 15:22). (4) Legal and blood lines both needed. Jesus' legal fatherhood came through Joseph, giving Him royal right. His blood humanity came from Mary (the virgin birth), ensuring His true humanity. The two genealogies, read together, testify to both — and to the wisdom of God in arranging an incarnation satisfying every OT prophetic requirement.