I
- Iamblichus, (ca. 245-ca. 325)
- Yahya ibn Adi (893-974)
- Ibn ar-Rawandi, (c. 910)
- Ibn Furak (c. 941 - 1015)
- Ahmad ibn Hanbal (780-855)
- Ibn Hazm, (994-1069)
- Hunein Ibn Ishak, (809-873)
- Ibn al-Khammar (942 - c. 1030)
- Ibn Masarra, (883-931)
- Ibn Miskawayh, (940-1030)
- Abd-Allāh Ibn al-Muqaffaʿ, (c. 720 - c. 756)
- Ibn al-Rawandi (died c. 910)
- Ibn al-Tayyib (died 1043)
- 'Isa ibn Zur'a (943-1008)
- Issac Ben Solomon Israeli, (c. 850-950)*
- Isidore of Seville (c. 560 - 636)
- Isvarakrsna, (5th century)
Read more about this topic: List Of Philosophers Born In The 1st Through 10th Centuries