Titles of the Holy Spirit
Besides the proper name of "Holy Spirit," which is most frequently used in the Acts of the Apostles and in the Epistles, we also find in St. Paul the titles: the Spirit of the promise, The Spirit of adoption, The Spirit of Christ, The Spirit of the Lord, and the Spirit of God - and, in St. Peter, the Spirit of glory.
Source: Catechism of the Catholic Church (Vatican.va)