Encyclopedias, Almanacs, Transcripts, and Maps
- Hyde, Abbey of
- Hyde, Ida Henrietta
- Hyères
- Hyesim
- Hyginus, St. Pope
- Hylomorphism
- Hylosystemism
- Hylozoism
- Hyman, Aaron
- Hyman, Harold Melvin
- Hyman, Joseph C.
- Hyman, Paula E.
- Hymans, Paul
- Hymnary
- Hymnology
- Hymns and Hymnals, I: Historical Developments
- Hymns and Hymnals, II: Vatican II and Beyond
- Hypatius of Ephesus
- Hypocrisy
- Hypostatic Union