Former Owner
- Mario Maffei1
- Marion H. Gottfried1
- Martin J. Cooper4
- Martin Picker3
- Martin Schøyen6
- Martin of Aragon1
- Marvin-L. Colker1
- Mary Augusta Strachey1
- Mary Bloch1
- Mary Elizabeth Holte1
- Mary Lacaita2
- Mary Lusher1
- Mary Schell Collins1
- Mary W. T. Dickinson10
- Mary, Queen of Scots1
- Matteo Barresi1
- Matteo Luigi Canonici4
- Matthew Simpson Parkhurst1
- Matthias Corvinus1
- Maurice Johnson1