Former Owner
- Marc-René de Voyer d'Argenson1
- Marchese Porri-Carcani1
- Margaret Le Seigneur1
- Marguerite of Lorraine1
- Marie Thomas1
- Mario Maffei1
- Marion Lawrence1
- Martin Breslauer1
- Marvin-L. Colker1
- Mary Stanley, Countess of Derby1
- Mary W. T. Dickinson6
- Mary, Queen of Scots1
- Mathias Schurer1
- Matteo Luigi Canonici3
- Matthew Bloxam1
- Matthew Donadski1
- Matthew Simpson Parkhurst1
- Maurice Johnson1
- Mayer Sulzberger1
- Menno Hertzberger1