Former Owner
- Joost Ritman1
- Juan Rodriguez1
- Juan de Iriarte y Cisneros1
- Juan de Londono1
- Judith Lady Montefiore College1
- Julius Bisno1
- Lawrence J. Schoenberg5
- Libreria antiquaria Mediolanum1
- Lisa Kiser1
- London School of Jewish Studies1
- Louis Charles Elson2
- Louis Lucien Bonaparte1
- Luis Ordoñez1
- Maggs Bros Ltd3
- Marianne F. ???1
- Mario Pedro Arata1
- Marquis of Astorga1
- Martin J. Cooper4
- Martin Picker1
- Martin of Aragon1