Jesus is his name.
And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus. (Luke 1:31)
There is no other name by which we must be saved.
And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved." (Acts 4:12)
The Apostles and the early Church did everything in the name of Jesus.
*And Peter said to them, "Repent, and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins; and you shall receive the gift of the Holy Spirit. (Acts 2:38)
But Peter said, "I have no silver and gold, but I give you what I have; in the name of Jesus Christ of Nazareth, walk." (Acts 3:6)
But Paul was annoyed, and turned and said to the spirit, "I charge you in the name of Jesus Christ to come out of her." And it came out that very hour. (Acts 16:18)*
The early Church was persecuted for the name of Jesus.
So they took his advice, and when they had called in the apostles, they beat them and charged them not to speak in the name of Jesus, and let them go. (Acts 5:40)
The name of Jesus is above every other name.
Therefore God has highly exalted him and bestowed on him the name which is above every name, (Phillipians 2:9)
The Feast of the Holy Name of Jesus on January 3 is one of the holiest days on the Church calendar. The martyrs died with the name of Jesus on their lips. The name of Jesus is one of the most powerful prayers. The devil recoils at the name of Jesus. Jesus is the beginning and the end, the alpha and the omega, the first and the last.
There is no other title or word which can express what his name expresses.
-Tim-