Former Owner
- Nonnberg Abbey1
- Norman H. Strouse4
- Norman Winestine1
- Norza, Leon1
- Notre-Dame de Macourt monastery1
- Noël Pinelli1
- Nur al-Din Arslan Shah I1
- Nārāyaṇa Gālane1
- Nīlakaṇṭha Tanūja1
- Oettingen-Wallerstein library1
- Offley Bohun Stovin Fairless Shore1
- Okar, Baganbhaṭṭa1
- Oliver Henry Perkins12
- Oliver R. Barrett4
- Omaha Public Library1
- Oric Bates2
- Orlandus de Fatiis1
- Oswald Carl Friedrich von Seilern und Aspang2
- Otto Ege52
- Otto Haas1