Encyclopedias, Almanacs, Transcripts, and Maps
- Ida of Toggenburg, Bl.
- IDA, Bb.
- Idaho, The Catholic Church in
- Idel, Moshe
- Idelovitch, David
- Idelsohn, Abraham Zvi
- Idelson, Abraham
- Idelson, Beba
- Idelson, Benjamin
- Identity, Muslim
- Identity, Principle of
- Idesbald, Bl.
- Idi
- Idi Bar Avin
- Idleness, Moral Aspects of
- Idolatry (in the Bible)
- Iduberga, Bl.
- Iggeret Ha-Kodesh
- Ignatian Spirituality
- Ignatius of Antioch, St.