Former Owner
- New York Academy of Medicine4
- Nicholas N. Martinovitch1
- Nicolas Antoine Labbey de Billy2
- Nicolaus Pol1
- Nilorudra Prabhugupta1
- Norman H. Strouse1
- Norman Winestine1
- Norza, Leon1
- Noël Pinelli1
- Nur al-Din Arslan Shah I1
- Nārāyaṇa Gālane1
- Nīlakaṇṭha Tanūja1
- Nūr al-Dīn Darvīsh2
- Oettingen-Wallerstein library1
- Offley Bohun Stovin Fairless Shore1
- Okar, Baganbhaṭṭa1
- Oliver Henry Perkins9
- Oliver R. Barrett2
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Ege2