Former Owner
- Nettie Goldsmith Naumburg1
- Neuwerk Nunnery1
- Niccolò Albergati1
- Nicholas Chevalier1
- Nicolai Briganti1
- Nicolas Fowle1
- Nicolas Rauch1
- Nicolaus Pol1
- Nicolaus de Monte Murro1
- Notre-Dame de Macourt monastery1
- Oettingen-Wallerstein library1
- Oliver Henry Perkins1
- Omaha Public Library1
- Orlandus de Fatiis1
- Otto Haas1
- Otto Jahn1
- Otto Orren Fisher1
- Owen D. Young1
- P. Desq1
- P. J. De Mat1