(Matthew 21:9) As for the crowds, those going ahead of him and those following kept crying out: “Save, we pray, the Son of David! Blessed is he that comes in Jehovah’s name! Save him, we pray, in the heights above!”
(Matthew 22:42) “What do YOU think about the Christ? Whose son is he?” They said to him: “David’s.”
(Luke 1:32) This one will be great and will be called Son of the Most High; and Jehovah God will give him the throne of David his father,
(John 7:42) Has not the Scripture said that the Christ is coming from the offspring of David, and from Beth?le·hem the village where David used to be?”
(Acts 2:30) Therefore, because he was a prophet and knew that God had sworn to him with an oath that he would seat one from the fruitage of his loins upon his throne,
(Matthew 28:16-20) 16*However, the eleven disciples went into Gal?i·lee to the mountain where Jesus had arranged for them, 17*and when they saw him they did obeisance, but some doubted. 18*And Jesus approached and spoke to them, saying: “All authority has been given me in heaven and on the earth. 19*Go therefore and make disciples of people of all the nations, baptizing them in the name of the Father and of the Son and of the holy spirit, 20*teaching them to observe all the things I have commanded YOU. And, look! I am with YOU all the days until the conclusion of the system of things.”
To the answer that says the geneology through Mary is the evidence, does not that mean her other children, James and Jude for example would be qualified for that Kingly position? We know they were men of faith and worked for the benefit of the 1st Century congregation.
What made Jesus "special" was not just the geneology, but his "means" of becoming a human descendent of David. While James and Jude had as much legal right as Jesus, they were both born as imperfect humans, who could never meet the needs of the ransom that Jesus could.