The Christian Gospel is powered by the Promised Savior and Redeemer who first was mentioned in Genesis chapter 3... and spoken of from that point on by the Jewish prophets -- over 300 highly specific prophecies which would be more than enough to identify the real Savior when He came.
He was called Jesus, because He would save the people from their sins. But this, at that time, was a very common name! But careful study will reveal that Jesus had many names and titles belonging to Him -- including one name that belongs to no one else.
Philippians 2:5-11 gives us the context for the Name of Jesus that proves He is God. Verses 9, 10 and 11 are the specific verses involved.
[9 Therefore God has highly exalted him and bestowed on him the name that is above every name,
10 so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth,
11 and every tongue confess that Jesus Christ is Lord, to the glory of God the Father. (ESV)]
Jesus had divested Himself of what made Him eternal and everlasting God, leaving that with the Father and the Spirit so that He might be found in the form of a servant... in other words, that He might be born a human male, subject to natural life as all humans are.
This, by shared divine will, He did, and found Himself in the FORM of a man and fully dependent and subject to God (The Father and Spirit) as all men are. He humbled Himself in all obedience -- even to obey the call to die on the cross for sins.
Succeeding, He rose, as predicted, as He personally promised He would, and was seen by hundreds of people alive after death.
Ascending into Heaven -- Philippians 2 now informs us -- He receives back to Himself that which He had emptied Himself of to become human, which included being given (back) the Name Above All Names.
Even false Christian cults have to acknowledge that the only name this could be referring to would be Jehovah or the variant of the same name: Yahweh.
We know that this is the Name Above All Names rather than Jesus because the Biblical text points us to something in linguistics called: "The Genitive of Possession."
This is a name that Jesus possesses.
If the Greek Text was written in the form of "The Genitive of Identity," then the Name would be self-reflexive -- to tell us that the Name of Jesus being alluded to... is, in fact, "Jesus."
But it is not of identity here in Philippians chapter two. It is the Genitive of Possession. This tells us Jesus has another name, that He possesses a second name which is being referred to here.
It is the Name which is above all names that are named, whether in Heaven, or on earth, or in all that is under the earth... so that at that name that Jesus has (other than the name Jesus), every knee will bow and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.
Being given the Name which is above all names "Yahweh/ Jehovah"... could not happen and could not by any means be right -- if that name had not previously and always belonged to Jesus as God. It is the Divine Name. Not any common name; only One Being may have this name, and it is God (all that is God... all that God is).
That Most Holy Name could not be given "to another"-- it could only belong to that which is "everlasting to everlasting." Psalm 90:2
It could only BELONG to Him "whose goings forth have been from of old, from everlasting." Micah 5:2 (KJV)
"I, the LORD, am the one, and I won't give my name and glory to another..." Isaiah 42:8 (ISV)
Successful, He returns to sit on the Throne of Heaven, takes again all that is His, as the Eternal Son, the Word of God who is with God and is God.
The Greek, through the linguistic term "Genitive of Possession" reveals to us the full reality that He who was known to the world as the male Jewish Carpenter-cum-Rabbi was in fact the Messiah, the Promised One, "God with us," our Redeemer.
At the mention of the name that belongs to Jesus, eternity future will find all beings everywhere dropping in worship to their knee and openly confessing the Eternal Truth... the Name that belongs to Jesus is the Divine Name above All Names. Yahweh-Jehovah, which identifies Him as a genuine intrinsic part of the One True Creator God who is the First and the Last, the Alpha and Omega, the Beginning and the End.
To Him belong the honor and the glory and the dominion forever and ever, Amen.