On the 9th Day of Christmas we celebrate the Feast of the Holy Name of Jesus!
Although, because of changes that happened with the Liturgical calendar, tomorrow’s Mass will celebrate it. But the whole month of January is dedicated to The Holy Name of Jesus! (No TL;DR today; it’s too important)
St. Paul in his letter to the Philippians wrote, “That in the name of Jesus every knee should bow, of those that are in heaven, on earth, and under the earth.” (2:10) (see the bottom link for other passages in Scripture about the Holy Name of Jesus)
His Holy Name was made known at the Annunciation, when the angel Gabriel said to Mary,
“Behold, you will conceive in your womb and bear a son, and you shall name him Jesus.
He will be great and will be called Son of the Most High,
and the Lord God will give him the throne of David his father,
and he will rule over the house of Jacob forever,
and of his kingdom there will be no end.”-Luke 1:31-33
Jesus means savior. He has many titles: God with us or Emmanuel, Christ, Lord, Master, Teacher or Rabbi, the Word (of God), Son of God and Son of Man, Son of David, Light of the World, Wonder Counselor, Redeemer, King of kings, Prince of Peace, Lamb of God, New Adam, King of the Jews, the Alpha and Omega, the Great I Am. He is the 2nd Person in the Holy Trinity of God, all the One True God in 3 forms that we may better know, love, and have a relationship with him.
Jesus’ Holy Name is invoked for many things. It is a prayer that stands alone. For bodily/physical needs- “Jesus, help me.” For spiritual trials- “Jesus, I trust you.” For protection against the evil one- you know the whole, “In Jesus’ name I order you to be gone Satan” you hear in the Exorcist and ghost hunting shows.
And as a reminder and way to give thanks of and for all the blessing and graces that are granted to us when we ask through the Name of Jesus. “If you ask the Father anything in my name he will give it you.”-John 16:23 Which is why you always hear, “Through Jesus,” or “In Jesus Name we ask,” or the like, even in the Mass.
We sometimes see His name written as IHS or with the Chi-Rho. Both are still in use today. And many Saints would use these in veneration to or praise of Jesus.
It is written by my confirmation Saint, Joan of Arc, that on the pennant that she herself carried against the enemy, a defense against them and aid to not kill, was in her own words, “The field of it was sown with lilies, and therein was our Lord holding the world, with two angels, one on either hand. It was white, and on it there were written the names Jhesus Maria, and it was fringed with silk.” She said, “I asked my Lord’s messengers what I should do. And they answered me, saying, Take up the banner of your Lord. And thereupon I had a banner made.”
You can find the Litany of the Holy Name of Jesus here: https://www.ewtn.com/faith/teachings/incab3c.htm
The pamphlet “THE WONDERS OF THE HOLY NAME” here: http://olrl.org/pray/wonders.shtml (Imprimatur 1946)
Some other good readings:
O Lord Jesus Christ, You have said, “Ask and you shall receive, seek, and you shall find, knock, and it shall be opened to you.” Grant, we beg of You, to us who ask it, the gift of Your most divine love, that we may ever love You with our whole heart, in word and deed, and never cease praising You.
Give us, O Lord, as much a lasting fear as a lasting love of Your Holy Name, for You, who live and are King for ever and ever, never fail to govern those whom You have solidly established in Your love. Amen.