- Word of God (Islam)2
- headpieces (layout features)2
- holographs (autographs)2
- illuminated manuscripts2
- Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad, -1355? Risālat al-waḍʻ2
- Īsāghūjī (Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar)2
- ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-6612
- ʻAqāʼid al-ʻAḍudīyah (Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad)2
- Ḥallāj, al-Ḥusayn ibn Manṣūr, 858 or 859-9222
- Abū Madyan, -1197 or 1198. ʻAqīdah1
- Abū Yazīd Bisṭāmī, Ṭayfūr ibn ʻĪsá, -874?1
- Adam (Biblical figure)1
- Adhan1
- Alchemy1
- Almucantar1
- Amīr Khusraw Dihlavī, approximately 1253-13251
- Anwār al-tanzīl wa-asrār al-taʼwīl (Bayḍāwī, ʻAbd Allāh ibn ʻUmar)1
- Anṣārī, Zakarīyā ibn Muḥammad, approximately 1423-approximately 1520. Taḥrīr tanqīḥ al-Lubāb fī fiqh al-Imām al-Shāfiʻī1
- Anṭākī, Maḥmūd ibn ʻAbd Allāh, -1747 or 1748. Risālat al-istiʻārah1
- Aphorisms and apothegms1