Former Owner
- Johann Heinrich von Speyr-Passavant1
- Johannes Lethe1
- John D. Stanitz1
- Juan de Londono1
- Judith Lady Montefiore College1
- Libreria antiquaria Mediolanum1
- London School of Jewish Studies1
- Luis Ordoñez1
- Martin Picker1
- Marvin-L. Colker1
- Mayer Sulzberger1
- Michele Amari1
- Monasterio de El Paular1
- Monastery of Benevívere1
- Monica Franklyn1
- Moritz Dessauer1
- Muḥammad al-Raʼīs1
- Muḥammad ʻAbd al-Ḥayy ibn ʻAbd al-Kabīr al-Kinānī al-Ḥasanī1
- Poor Clares1
- Robert Dechert1