Former Owner
- Millard Meiss1
- Minerva Kaiser1
- Minnis, Katherine1
- Mirmellus Arnandi1
- Molin1
- Monsieur de Bel Air1
- Morton Davis Mitchell1
- Mrs. F. W. Bartlett1
- Mrs. Turnbull1
- Muriel Agnes Fry1
- Murray Anthony Potter1
- Museo Cavaleri1
- Muḥammad ʻAbduh1
- Muḥammad Ṣābir1
- Muṣṭafá Shāh ʻAlāʼī1
- N. Pauli1
- Nathaniel Castleton Stephen Poyntz1
- Nathaniel G. Snelling1
- Neuwerk Nunnery1
- Niccolò Albergati1