Author
- Abū Bakr ibn Ismāʻīl Shanawānī1
- Abū Isḥāq Ibrāhīm Muṣannif1
- Aharon ben Yitsḥaḳ Gerish1
- Ahmad ibn Muhammad ibn Kathīr al-Farghānī1
- Ahmed ibn Nasir1
- Akiva ben Joseph1
- Al-Khwarizmi1
- Al-Larí1
- Al-Mu'azzam Isa1
- Al-Ḥusayn ibn al-Ḥasan Jurjānī1
- Albert Schultens1
- Alfonso X of Castile and Leon1
- Ali-Shir Nava'i1
- Amir Khosrow1
- Anshe Maase (Corfu)1
- Armenian Catholic Church1
- Asher ben Jehiel1
- Athanasius of Alexandria1
- Autolycus of Pitane1
- Avraham Daṿid ben Shemʻayah Shemuʼel Papo1