Author
- Jacob Israel Karmi1
- Jacob Meyer1
- Jalal al-Din al-Qazwini1
- Jerome de Prado1
- Johannes ab Indagine1
- John XXII1
- Josef ibn Tabul1
- Joseph ben Abraham Gikatilla1
- Joseph ben Judah ibn Aknin1
- Joseph ibn Migash1
- Joshua ben Israel Benveniste1
- Judah Leib Prossnitz1
- Judah ben Saul ibn Tibbon1
- Karasik, Ber, active 19th century1
- Kurdī, ʻAbd Allāh ibn Muḥammad, d. 16541
- Kāśīnātha (Son of Ananta)1
- Kāẓim ibn Qāsim Rashtī1
- Leonardo Bruni1
- Makkī ibn Ḥammūsh Qaysī1
- Manṣūr Ṭablāwī1