Former Owner
- Minnis, Katherine1
- Mistrie, Sita Ram, Pandit1
- Mitchell Starrett Buck1
- Molin1
- Monasterio de El Paular1
- Monastery of Benevívere1
- Monastery of Saint Peter (Erfurt, Germany)1
- Monica Franklyn1
- Monsieur de Bel Air1
- Moritz Dessauer1
- Moritz Joseph Johann von Dietrichstein1
- Morot1
- Mortimer Loeb Schiff1
- Morton Davis Mitchell1
- Morton Parker Eden1
- Mount Zion Abbey1
- Moḍaka, Vināyaka1
- Mrs. E.J. Hooper1
- Mrs. F. W. Bartlett1
- Mrs. Turnbull1