“Jesus” represents the Greek (and Latin) form of the Hebrew name Yeshua, a very common name among Jews in antiquity. Until the exile, the longer form Yehoshua was used, which appears in the English Bible as Joshua.

Jesus was Jewish as such he was circumcised at 8 days old, as a sign of the 1st covenant God made with Abraham and his descendants. (Genesis 17:11-13) As with infant baptism the naming of the child is an important part of the ceremony. Names were tradinally passed down in families, but God had chosen Jesus name in advance.

The origin of Jesus name is told, in Matthew's account of the annunciation to Joseph of Jesus’ birth, the reason given: “for he will save his people from their sins” (Matthew 1:21). The Hebrew, Yeshua, means “The Lord (Yah) saves.” The Messiah the Jews were expecting was a Warrior like Joshua who would lead Israel to victory over the Roman Empire, they didn't realize that to God the victory over sin and death was far more important.

There is power in the Name of Jesus, he taught that if you pray in his name, you gain His attention, His presence and His authority.

“In solemn truth I tell you, anyone believing in me shall do the same miracles I have done, and even greater ones, because I am going to be with the Father. You can ask him for anything, using my name, and I will do it, for this will bring praise to the Father because of what I, the Son, will do for you.– John 14:12,13

In Acts you see the disciples healing the sick and bringing the dead back to life using only the power of Jesus name. The power of the Holy Spirit accessed through the name of Jesus is still the mightiest power in the universe.