Former Owner
- Marchese Porri-Carcani1
- Margaret Le Seigneur1
- Margaret of Croy1
- Marguerite of Lorraine1
- Mary Schell Collins1
- Matteo Luigi Canonici1
- Mercantile Library Company1
- Minnis, Katherine1
- Morot1
- Muriel Agnes Fry1
- N. Pauli1
- Nathaniel Sherman Bouton1
- Nicholas B. Scheetz1
- Paul Gottschalk1
- Peter Arrell Brown Widener1
- Peter Arrell Brown Widener II1
- Peter Le Neve1
- Petrus Giraud1
- Petrus Hofstede1
- Petrus Jensenius1