Former Owner
- Maria Riddell1
- Markus Fugger1
- Mary Augusta Strachey1
- Maximilian Henry of Bavaria1
- Mayer Sulzberger1
- Mazliah Finzi1
- Maḥmūd bin Nāṣir1
- Michael Bernays1
- Mitchell Starrett Buck1
- Mobed Framji Fardunji Madan1
- Mobed Hormazdyar Mobed Khodabaksh1
- Mohammed bin Hamed bu Osman1
- Monastero di Santo Spirito in Verona1
- Monteles, Avraham de1
- Monteles, Yosef de1
- Moritz Dessauer1
- Moritz Joseph Johann von Dietrichstein1
- Morris Harold Saffron1
- Mortimer Frank1
- Morton Parker Eden1