The name of Jesus is above every other name. All named belonging to Jesus represent His attributes and qualities. They are not titles

Jesus didn’t begin His existence when he became a baby in Bethlehem or when He was conceived in the womb of Mary, He is the Eternal Son of God.In the old testament, we hear about angels( malach) or messengers. Angels include- cherubims, seraphims and many others but all these aren’t Jesus Christ but Jesus existed. During the battle of Armeggedon, the Lord fought in the battle Zec 12:8. Using His angels. But in Gen 22:26, God himself is speaking and making a covenant with Abraham.
We can conclude that Jesus was very active in old testament timed as an angel that God was to send to the world.

In the days of moses, He appeared as a flame of fire.

The angel of the Lord was identified as being Yahweh, Elohim both Lord and God in the old testament.

Jesus is the Lord of Host, The redeemer, He’s the king, He’s the God of armies of Israel and He’s the commander of the army of the Lord.

We have one Gid who exist in three persons Father, Son and Holy Spirit.