Author
- Ibrāhīm ibn Muṣṭafá Ḥalabī1
- Ibrāhīm ʻArshī1
- Idris Bitlisi1
- Ikhtiyār al-Dīn ibn Ghiyāth al-Dīn1
- Imami Heravi1
- Inayat Khan1
- Inayet Efendi1
- Insha Allah Khan1
- Ismail bin Mohammad Rizi1
- Ismāʻīl ibn Luṭf Allāh Bākharzī1
- Ismāʿīl Ibn-Muḥammad Ibn-Bardis1
- Isḥāq1
- Isḥāq ibn Ibrāhīm Fārābī1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Izzatullah Bengali1
- Jaafar Al-Sadiq1
- Jaghmini1
- Jai Singh II1
- Jakob Eduard Polak1
- Jalal al-Din Mohammad Tabrizi1