Author
- Ibrāhīm ibn Manṣūr Nīsābūrī1
- Ibrāhīm ibn Muḥammad Ibn Ḥamzah1
- Ibrāhīm ibn Muḥammad ḥarīthī1
- Ibrāhīm ibn Muṣṭafá Waḥdī1
- Ibrāhīm ibn Yūsuf Būlawī1
- Ibrāhīm ʻArshī1
- Idris Bitlisi1
- Ikhtiyār al-Dīn ibn Ghiyāth al-Dīn1
- Imami Heravi1
- Immanuel Bonfils1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Inayat Khan1
- Innocent III1
- Ippolito Libri1
- Isaac Albalag1
- Isaac Israeli ben Joseph1
- Isaac Israeli ben Solomon1
- Isaac Lattes1
- Isaac of Troki1
- Isaac the Blind1