Former Owner
- Monastery at San Gregorio al Celio1
- Monica Franklyn1
- Monsieur de Bel Air1
- Morell Thurston1
- Moritz Dessauer1
- Morot1
- Morris H. Morgan5
- Mrs. E.J. Hooper1
- Muriel Agnes Fry1
- Murray Anthony Potter1
- Muḥammad Anīs Ṭālawī1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1
- Muḥammad ibn Jaʻfar Yaḥyá1
- Muḥammad Ṣadr al-Dīn1
- Muṣṭafa Ṣidḳī1
- Muṣṭafá Ṣidqī1
- N. Pauli1
- Nancy McGrath1
- Nanna Corbinello1