Former Owner
- Madame Théophile Belin1
- Manoel S. Pinto1
- Manuel John Johnson1
- Marcianus F. Rossi1
- Marianne F. ???1
- Marilyn Carbonell1
- Mario Pedro Arata1
- Mark Lansburgh1
- Martin Picker1
- Mary Schell Collins1
- Mary Talbot, Countess of Shrewsbury1
- Mary W. T. Dickinson1
- Matthaeus Lupin1
- Melchior Daniel Neubronner1
- Merlemont family1
- Michiel family1
- Morris Jastrow, Jr.1
- Mortimer Loeb Schiff1
- Museo Cavaleri1
- Nancy McGrath1