We know the Father's personal name ("Jehovah", Ps. 83:18; KJV) and we know the Son's personal name (Jesus). Because it means everlasting life to know God (John 17:3), and if the Holy Spirit really is God, then why doesn't the Holy Spirit have a personal name?
Since God Himself is a spirit and is holy and since His faithful angelic sons are spirits and holy, it is evident that if the "holy spirit" really were a person, (especially God Himself) there should reasonably be given some means in the scriptures to distinguish and identify such spirit person from all of these other "holy spirits".
But because the holy spirit is God's active force and not a person, it makes sense why the holy spirit remains nameless and unidentifiable in the Bible.
For more, see
Holy Spirit