Author
- Jehiel ben Jekuthiel ben Benjamin Anav1
- Jerome1
- Jewish Community of Pitigliano, Italy1
- Jewish community of unidentified city, Italy1
- Joannes de Crivelli1
- John Dominici1
- John XXI1
- Joseph Angelet1
- Joseph Trani1
- Josephus1
- Justinian I1
- Laurentius Cynthius1
- Leo I1
- Leʼon di Belentish1
- Lorenzo Valla1
- Luca Pacioli1
- Ludovicus Valentia de Ferraria1
- Marcantonio Genua1
- Marcus Gavius Apicius1
- Mariano da Firenze1