Former Owner
- Matthaeus Lupin1
- Matthew Donadski1
- Maximilian Henry of Bavaria1
- Maxwell Sommerville1
- Mayer Sulzberger2
- Maḥmūd bin Nāṣir1
- Maḥmūd ibn al-Shaykh al-Fattāḥ1
- Melchior Daniel Neubronner1
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1
- Michael M. Zagayski1
- Michiel family1
- Miha'el Hayyim ben Yosef bar Ya'akov1
- Mikhail Golitsyn1
- Milton Fischmann2
- Miriam Lutcher Stark2
- Mobed Framji Fardunji Madan1
- Mobed Hormazdyar Mobed Khodabaksh1
- Mohammed bin Hamed bu Osman1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1
- Monastero di Santo Spirito in Verona1