Former Owner
- Marienstiftsgymnasium1
- Marilyn Carbonell1
- Mario Maffei1
- Marion H. Gottfried1
- Marion Lawrence1
- Mariota Lyle1
- Mark Lansburgh1
- Markus Fugger1
- Martin Breslauer1
- Martinus Nijhoff1
- Mary Augusta Strachey1
- Mary Elizabeth Holte1
- Mary Schell Collins1
- Mary Stanley, Countess of Derby1
- Mary Talbot, Countess of Shrewsbury1
- Mary, Queen of Scots1
- Mathias Schurer1
- Matteo Barresi1
- Matthew Bloxam1
- Matthew Hale1