Author
- Albertanus of Brescia1
- Albertus Magnus1
- Albrecht von Pfalz-Mosbach1
- Aldobrandino da Siena1
- Alessandro Farnese1
- Alessandro Piccolomini1
- Alessandro da Sassoferrato1
- Alexander III1
- Alexander IV1
- Alfonso Gondi1
- Alfonso Spezzani1
- Alfonso X of Castile and Leon1
- Ali Shah Durrani1
- Ali ibn Abi Bakr al-Haythami1
- Ali ibn Ridwan1
- Aljawjary1
- Alkawākiby1
- Almirighty1
- Alonso Bello1
- Alonso Martin del Canto1