Catechism of the Catholic Church §691 — excerpt
"Holy Spirit" is the proper name of the one whom we adore and glorify with the Father and the Son. the Church has received this name from the Lord and professes it in the Baptism of her new children.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: In 3:5-8