Former Owner
- Millard Meiss1
- Milt Freudenheim1
- Milton S. Carothers1
- Minerva Kaiser1
- Minnis, Katherine1
- Molin1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1
- Monastero di Santo Spirito in Verona1
- Monastery at San Gregorio al Celio1
- Monica Franklyn1
- Monsieur de Bel Air1
- Morell Thurston1
- Moritz Dessauer1
- Morot1
- Mrs. E.J. Hooper1
- Muriel Agnes Fry1
- Murray Anthony Potter1
- Muḥammad Anīs Ṭālawī1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1