Encyclopedias, Almanacs, Transcripts, and Maps
- Other Pentecostals
- Other Psychic New Age Groups
- Other Psychic New Age Groups
- Other Theosophical Groups
- Other Theosophical Groups
- Othlo of Sankt Emmeram
- Othmar, St.
- Othniel
- Otranto
- Ott, Michael
- Otta, Francisco
- Ottaviani, Alfredo
- Ottensosser, David
- Ottinger, Albert
- Otto I (The Great), Emperor
- Otto II, Emperor
- Otto III, Emperor
- Otto of Bamberg, St.
- Otto of Cappenberg, Bl.
- Otto, Rudolf