Christ never calls himself the Alpha and Omega. Neither in Rev 1:1, 1:8, 1:11 (As the KJV for some reason spuriously interpolates), or in 22:13 (Which is an Angel bearing a message from the Father). He calls himself "First and Last" because he's the Firstborn of Creation and the "Last Adam".
He calls Himself the First and the Last because of His eternal nature as God ( see Isaiah 44:6 and 48:12)The underlined verses below in chapters 1 and 22 show that it is Jesus who is the subject of the book of Revelation and it is Jesus who is to come again.
John, to the seven churches which are in Asia:
Grace to you and peace from Him who is and who was and who is to come, and from the seven Spirits who are before His throne, and from Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth.
To Him who loved us and washed us from our sins in His own blood, and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.
Behold, He is coming with clouds, and every eye will see Him, even they who pierced Him. And all the tribes of the earth will mourn because of Him. Even so, Amen.
I am the Alpha and the Omega, the Beginning and the End, says the Lord,who is and who was and who is to come, the Almighty. Rev. 1;4-8
And behold,
I am coming quickly,
and My reward is with Me, to give to every one according to his work. I am the Alpha and the Omega, the Beginning and the End, the First and the Last.Blessed
are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city. But outside
are dogs and sorcerers and sexually immoral and murderers and idolaters, and whoever loves and practices a lie. I
, Jesus, have sent My angel to testify to you these things in the churches.
I am the Root and the Offspring of David, the Bright and Morning Star.
And the Spirit and the bride say,
Come! And let him who hears say,
Come! And let him who thirsts come. Whoever desires, let him take the water of life freely.
For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and
from the things which are written in this book. He who testifies ti these things says, "
Surely, I am coming quickly".
Amen. Even so,
come, Lord Jesus! The grace of our Lord Jesus Christ
be with you all. Amen Rev. 22:12-21
With that said, it says the child's name itself will be "Immanuel" which is far different than a title as listed. Even if Israelite names are titles. And the name "Immanuel' was the name of the child in Isaiah 8.
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Jesus means Yahweh [the Lord] is Salvation, Christ means Anointed One, and Immanuel means God with us...all appropriate names for God the Savior of the world.