Author
- Ismāʻīl ibn Ibrāhīm İsfendiyaroǧlu1
- Izz al-Din ibn 'Abd al-Salam1
- Jacob Berab1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Josef ibn Tabul1
- Joseph ben Abraham Gikatilla1
- Joseph ben Gorion1
- Joshua ben Israel Benveniste1
- Joshua ibn Shuaib1
- Juana I of Castile1
- Judah Rosanes1
- Judah ben Saul ibn Tibbon1
- Kalim Kashani1
- Kalonymus ben Kalonymus1
- Khalīl Ibn Walī1
- Khaṭīb, ʻAlāʼ al-Dīn ibn ʻAbd al-Bāqī, fl. 15951
- Khvājah Muḥammad Pārsā1
- Krishnamishra1
- Kulaynī, Muḥammad ibn Yaʻqūb, -941?1
- Lamii çelebi1