Former Owner
- Hospital de Jesús Nazareno1
- Howard Lehman Goodhart1
- Jacobus de Muffoni1
- James Stevens-Cox1
- Johan Laborya de Mossach1
- Johann Heinrich von Speyr-Passavant1
- Johannes Lethe1
- John Cochran1
- John D. Stanitz1
- Joost Ritman1
- Juan Rodriguez1
- Juan de Iriarte y Cisneros1
- Juan de Londono1
- Judith Lady Montefiore College1
- Julius Bisno1
- Libreria antiquaria Mediolanum1
- Lisa Kiser1
- London School of Jewish Studies1
- Louis Lucien Bonaparte1
- Luis Ordoñez1