Author
- Henry Hakesalt3
- Henry Suso3
- Homer3
- Honorat Bovet3
- Hubert de Burgh, 1st Earl of Kent3
- Ibn 'Abd al-Barr3
- Ibn Abi Zayd al-Qayrawani3
- Ibn Duraid3
- Ibn Ghazi al-Miknasi3
- Ibn Jaber al-Andalusi3
- Ibn Mufliḥ al-Maqdisī, Muḥammad, -13623
- Ibn al-Imām3
- Ibn al-Kharrāṭ3
- Ibn al-Salah3
- Ibn al-Wardi3
- Immanuel Bonfils3
- Isaac Newton3
- Ishmael ben Abraham Isaac ha-Kohen3
- Ismāʻīl Ghāzānī3
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī3