Author
- Horace1
- Hugh Bigod, 3rd Earl of Norfolk1
- Hugh Talemache1
- Hugh of Saint-Cher1
- Ibn Abi al-Isbaʻ1
- Ibn Battah1
- Ibn Khalawayh1
- Ibn Malik1
- Ibn al-Ajdābī1
- Ibn al-Khabbaz1
- Ibn al-Ḥājib1
- Innocent IV1
- Innocent V1
- Iohannes de Ianna1
- Isaac Albalag1
- Isaac Israeli ben Solomon1
- Jamāl al-Dīn Ḥaṣīrī1
- Jerome1
- John de Breton1
- John de Seccheville1