Former Owner
- Mercantile Library Company1
- Meschatin La Faye family1
- Messieurs Du Trieu2
- Michaeliskonvent1
- Milton Fischmann9
- Monastero di Santo Spirito in Verona1
- Moritz Dessauer1
- Morot1
- Mrs. E.J. Hooper1
- Museo Cavaleri1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1
- Muḥammad Ṣābir1
- Muṣṭafa Ṣidḳī1
- Muṣṭafá Ṣidqī1
- Nanna Corbinello1
- Nicholai von Bodeck1
- Nicolas Antoine Labbey de Billy1
- Nonnberg Abbey1
- Norman H. Strouse3