In the first chapter of Revelation we read
“I am the Alpha and the Omega,” says the Lord God, “who is and who was and who is to come, the Almighty.” (Rev 1:8)
Then, in the last chapter, Jesus says
“I am the Alpha and the Omega, the first and the last, the beginning and the end.” (Rev 22:13)
So Jesus takes on the names of his father. This was explained by Paul in Philippians:
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.
When Jesus took on some of his father’s work, he also took on his names.