Encyclopedias, Almanacs, Transcripts, and Maps
- Adrian IV, Pope
- Adrian of Castello (de Corneto)
- Adrian V, Pope
- Adrian VI, Pope
- Adrian, St.
- Adrianus
- Adriel
- Adso of Montier-en-Der
- Aduarte, Diego Francisco
- Adulam Region
- Adultery (in the Bible)
- Adventist Family
- Adventist Family: Intrafaith Organizations
- Advertence
- Advertisements, Book of
- Aelfric Grammaticus
- Aelfric of Canterbury, St.
- Aelfryth of Crowland, St.
- Aelian°
- Aelred (Ailred), St.