Encyclopedias, Almanacs, Transcripts, and Maps
- Indy, Vincent d'
- Indyk, Martin
- Ine, King of Wessex
- Ineffability of God
- Inerrancy, Biblical
- Infancy Narratives
- Infant Jesus of Prague
- Infeld, Leopold
- Infinity of God
- Informers
- Infralapsarians (Sublapsarians)
- Ingathering of the Exiles
- Inge, Hugh
- Ingen Ryuki
- Ingenuin, St.
- Ingleby, Francis, Bl.
- Inglis, Charles
- Ingolstadt
- Ingram, John, Bl.
- Ingwiller