- Alfonso I King of Asturias, 693-7561
- Alfonso III, King of Asturias and Leon, approximately 848-approximately 9101
- Alfonso V, King of Asturias and León, 994-1027 or 10281
- Alfonso VI, King of Castile and Leon, 1030-11091
- Alfonso VII, The Emperor, King of Castile, 1104-11571
- Alfonso VIII, King of Castile, 1155-12141
- Alfīyah fī muṣṭalaḥ al-Ḥadīth (Suyūṭī)1
- Algeria1
- Alif (The Arabic letter)1
- Alimony (Islamic law)1
- Aljamía1
- Almagest (Ptolemy)1
- Almanacs, German1
- Alphabet books1
- Alphabet--Religious aspects--Islam1
- Ambassadors1
- Ambrose, Saint, Bishop of Milan, -3971
- Amidah (Jewish prayer)1
- Amānāt wa-al-iʻtiqādāt (Saʻadia ben Joseph)1
- Amīr Khusraw Dihlavī, approximately 1253-13251