Author
- Abu-'L-Barakat ibn-Al-Anbari1
- Abū ʿAmr al-Dānī1
- Abū Ṭāhir al-Samarqandī1
- Accursius1
- Adam of Aldersbach1
- Adam of Bockenfield1
- Akhī Zādah1
- Al-Biruni1
- Al-Khatib al-Baghdadi1
- Al-Khazini1
- Al-Mu'azzam Isa1
- Al-Nawawi1
- Albertanus of Brescia1
- Albertus Magnus1
- Alexander IV1
- Ambrose1
- Anquetil Raolée1
- Anselm of Canterbury1
- Arnulf of Bohéries1
- Arnulf of Orléans1