Actually, I think Jesus can be, theologically but not from the Law, considered a son of Aaron because Jesus is the first-born of ALL creation.
Firstborn Does Not Mean Created, it speaks of preeminence.
Christ is preeminent is ALL things within our universe:
Creation: Jn 1:3 & 10, Col 1:16, 1 Cor 8:6
Redemption: Gal 3:13, Rev 5:9, Col 1:14, Rom3:24
Resurrection: Jn 11:25, Acts 4:33, 1Pet 1:3 & 3:21
Mediation: 1 Tim 2:5, Heb 8:6, 9:15, 12:24
Jugdement: Jn 5:22, Rom 2:16, 2 Tim 4:1
Scriptural help:
Col 1:
13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
14 In whom we have redemption through his blood, even the forgiveness of sins:
15 Who is the image of the invisible God, the firstborn of every creature:
(MY NOTE: The Son of God is the "visible" image of the "invisible" God. 2ndly; "firstborn of all creation" "isn't claiming" Jesus is created. Ps 89:27 Refers to David as his "firstborn" king. Yet, Saul reigned as King before David)
6 By Christ "were all things created" that are in heaven & that are in earth, visible & invisible, whether they be thrones, dominions, principalities, or powers: "all things were created by him" & for him
(MY NOTE: Christ/Jesus created all things! Only God creates all things)
17 Christ is before all things & by him all things consist
(MY NOTE: Christ/Jesus created all things. And hold everything together. Only God can create & then hold, all things together)
18 Christ is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence
(MY NOTE: Jesus is referred to as being the "firstborn of the dead". Yet, many died before him. Firstborn of all creation is referring to the fact that Jesus has preeminence. First place in everything that HE brings into existence. To include here: The first Resurrected from the dead)
Strong's g4416 firstborn
4416 prōtótokos (from 4413 /prṓtos, "first, pre-eminent" and 5088 /tíktō, "bring forth") – properly, first in time (Mt 1:25; Lk 2:7); hence, pre-eminent (Col 1:15; Rev 1:5).
4416 /prōtótokos ("firstly") specifically refers to Christ as the first to experience glorification, i.e. at His resurrection (see Heb 12:23; Rev 1:5). For this (and countless other reasons) Jesus is "preeminent" (4416 /prōtótokos) – the unequivocal Sovereign over all creation (Col 1:16).
https://biblehub.com/greek/4416.htm
Dictionary help:
Vine's Expository Dictionary of New Testament Words: First-begotten, Firstborn
[ 1,,G4416, prototokos ]
firstborn" (from protos, "first," and tikto, "to beget"), is used of Christ as born of the Virgin Mary, Luke 2:7; further, in His relationship to the Father, expressing His priority to, and preeminence over, creation, not in the sense of being the "first" to be born. It is used occasionally of superiority of position in the OT; See Exodus 4:22; Deuteronomy 21:16-Deuteronomy 21:17, the prohibition being against the evil of assigning the privileged position of the "firstborn" to one born subsequently to the "first" child.
The five passages in the NT relating to Christ may be set forth chronologically thus:
(a) Colossians 1:15, where His eternal relationship with the Father is in view, and the clause means both that He was the "Firstborn" before all creation and that He Himself produced creation (the genitive case being objective, as Colossians 1:16 makes clear);
(b) Colossians 1:18; Revelation 1:5, in reference to His resurrection;
(c) Romans 8:29, His position in relationship to the church;
(d) Hebrews 1:6, RV, His Second Advent (the RV "when He again bringeth in," puts "again" in the right place, the contrast to His First Advent, at His birth, being implied); cp. Psalms 89:27. The word is used in the plural, in Hebrews 11:28, of the firstborn sons in the families of the Egyptians, and in Psalms 12:23, of the members of the Church.
Note: With
(a) cp. John 1:30, "He was before me," lit., "He was first (protos) of me," i.e., "in regard to me," expressing all that is involved in His preexistence and priority.
https://studybible.info/vines/First-begotten, Firstborn
FINALLY:
Micah 5:2 Oh Bethlehem, you are little to be among the clans of Judah; out of you shall One come forth for Me Who is to be Ruler in Israel, Whose goings forth have been from old, from everlasting.
(MY NOTE: Christ is from everlasting, no beginning & not created. Fleshly/born/incarnated in Bethlehem, from the Tribe of Judah [NOT LEVI] also known/called the Lion of the Tribe of Judah REV 5:5)