Scribe
- Joseph ben Abraham Finzi1
- Joseph ben Isaac Gallico1
- Juan de la Mote1
- Judah ben Jacob1
- Jābir ibn Ibrāhīm, active 16th century1
- Jābir ibn Sālim Shihāb al-Baghdādī1
- Kamal al-Din al-Ghazzi1
- Kastamūnī, ʻAbd al-Raḥmān1
- Khalid Balti1
- Khān Muḥammad Maḥmūd ibn Ḥusayn ibn Muḥammad1
- Khūjah, Muḥammad Aḥmad1
- Kâtip Boşnāḳ Ibrāhīm ibn Aḥmet1
- Kāśīnātha1
- Kāśīnātha Devadhara (Son of Rāmabhaṭṭa Devadhara)1
- Kīrtidhara1
- Ladrāwī, ʻAbd al-Karīm ibn Muḥammad, active 14th century?1
- Lena suor1
- Leonhard Bernecker1
- Lorenzo da Pisa1
- Luxeuil Abbey1