Author
- Accursius1
- Adam of Aldersbach1
- Adam of Bockenfield1
- Akhī Zādah1
- Al-Biruni1
- Al-Khatib al-Baghdadi1
- Al-Khazini1
- Al-Mu'azzam Isa1
- Al-Nawawi1
- Al-Suhayli1
- Albertanus of Brescia1
- Albertus Magnus1
- Alexander IV1
- Ambrose1
- Anquetil Raolée1
- Anselm of Canterbury1
- Arnulf of Bohéries1
- Arnulf of Orléans1
- Aḥmad Ibn-Muḥammad al- Maidānī1
- Aḥmad ibn Muḥammad Harawī1