4 For this reason he has also straightway called Him by this title, naming Him Jesus. For this name, Jesus, is not Greek, but in the Hebrew language it is thus called Jesus; which is, when interpreted into the Greek tongue, “A Saviour.” And He is called a Saviour, from His saving His people.
Do you see how he has given wings to the hearer, at once speaking things familiar, and at the same time by these indicating to us things beyond all hope? I mean that both these names were well known to the Jews. For, because the things that were to happen were beyond expectation, the types even of the names went before, in order that from the very first all the unsettling power of novelty might be taken away. Thus he is called Jesus, who after Moses brought the people into the land of promise. Have you seen the type? Behold the truth. That led into the land of promise, this into heaven, and to the good things in the heavens; that, after Moses was dead, this after the law had ceased; that as a leader, this as a King.
However, lest having heard the word Jesus, you should by reason of the identity of the name be perplexed, he has added, “Jesus Christ, Son of David.” But that other was not of David, but of another tribe.
Source: Homilies on the Gospel of St. Matthew (New Advent)