Scribe
- Johannes de Luxia1
- Johannes de Novara1
- Johannes van der Kemp1
- Johannes, de Beylario1
- Johannis Caulier2
- John Capgrave1
- John Clerk1
- John Shirley1
- John Waller1
- Judah ben Jacob1
- Kaspar Ytelhuser1
- Katharinenkirche, Nuremberg1
- Katherina Mast1
- Ladrāwī, ʻAbd al-Karīm ibn Muḥammad, active 14th century?1
- Laurentius4
- Laurenziano Leone1
- Leonardus Job2
- Leonhard Bernecker1
- Lorenzo da Pisa1
- Manouēl Grēgoropoulos1