Former Owner
- Matthew Donadski1
- Maximilian Henry of Bavaria1
- Michael M. Zagayski1
- Michiel family1
- Milton Fischmann1
- Monasterium sanctorum quadraginta martyrum (Treviso Italy)1
- Monastery of Our Lady of the Angels of Churubusco1
- Morris H. Morgan1
- Morris Jastrow, Jr.1
- Nicolai Briganti1
- Nicolas Antoine Labbey de Billy1
- Nicolaus de Monte Murro1
- Norman H. Strouse1
- Oettingen-Wallerstein library1
- Otto Jahn1
- Owen D. Young1
- Paolino Gianfilippi1
- Paolo Giovio1
- Paulus de Graecus1
- Peter Ludwig1