Scribe
- Ibrāhīm ibn Abī al-Suʻūd Jīzāwī1
- Ibrāhīm ibn Aḥmad Ḥanāshī1
- Isidore of Kyiv1
- Jacobus de Adriani1
- Jacobus de Mutina1
- Jafājī, Muḥammad1
- Jayata, son of Valabhadra1
- Jehan Engremer1
- Joannes Suardus1
- Johann Pilter1
- Johann Schwayckofer1
- Johann von Neuburg1
- Johannes Antonius de Mirano1
- Johannes Baptista Filius1
- Johannes de Camenago1
- Johannes de Kuppferberg1
- Johannes de Tossens1
- Johannes of Regensburg1
- John Bale1
- John Capgrave1