Former Owner
- London School of Jewish Studies1
- Louis Lucien Bonaparte1
- Luis Ordoñez1
- Marianne F. ???1
- Mario Pedro Arata1
- Marquis of Astorga1
- Martin Picker1
- Martin of Aragon1
- 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
- Nicholas B. Scheetz1
- Ohio State University School of Music1
- Otto Orren Fisher1