Former Owner
- Martin Schøyen2
- Martinus Nijhoff1
- Marvin-L. Colker1
- Mary Augusta Strachey1
- Mary Elizabeth Holte1
- Mary Lacaita2
- Mary Lusher1
- Mary Schell Collins1
- Mary Stanley, Countess of Derby1
- Mary Talbot, Countess of Shrewsbury1
- Mary W. T. Dickinson10
- Mary, Queen of Scots1
- Marāṭha, Raṅganātha1
- Mathias Schurer1
- Matteo Barresi1
- Matteo Luigi Canonici13
- Matthew Bloxam1
- Matthew Donadski1
- Matthew Hale1
- Matthew Simpson Parkhurst1