- Ibn Jumayʻ, Hibat Allāh ibn Zayn, -1198. Taṣrīḥ bi-al-maknūn fī tanqīḥ al-Qānūn2
- Ibn al-Najjār, Taqī al-Dīn Muḥammad ibn Aḥmad, 1492 or 3-1564 or 5. Muntahá al-irādāt2
- Illumination of books and manuscripts, Ethiopian2
- Imamate2
- Indonesia--Sumatra2
- Irshād al-adhhān ilá aḥkām al-īmān (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)2
- Islamic cosmology2
- Islamic law--Language2
- Islamic occultism2
- Italy--Casale Monferrato2
- Iẓhār al-asrār (Birgivî Mehmet Efendi)2
- Japanese sewing2
- Jaʻfar al-Ṣādiq, 702?-765 or 7662
- Jewish religious poetry2
- Jews--Emancipation2
- Jews--Medicine2
- Judgment Day (Islam)2
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. ḥāshiyah ʻalá Sharḥ Shamsīyah2
- Khafrī, Muḥammad, -1407 or 1408. Ḥāshīyah ʻalá Sharḥ al-Qūshjī ʻalá al-Tajrīd2
- Khūjahʹzādah, ʻAbd al-Naṣīr ibn ʻAbd Allāh, active 16th century. Taḥrīrāt ʻalá al-Ṭarīqah al-Muḥammadīyah2