Former Owner
- Nicolas Yemeniz1
- Nicolaus Pol1
- Nicolaus de Monte Murro1
- Nonnberg Abbey1
- Norman H. Strouse4
- Northwich Library1
- Octave Chavaillor1
- Oettingen-Wallerstein library1
- Oliver Henry Perkins2
- Oliver R. Barrett1
- On inside front cover: "Graf v. Villers von Burges<?>, 1817" in ink; "London [Lauden?] 21535x" in pencil; "Douanes Paris Exposition" on a faded round pink sticker. "Memorandum from the Johnson Library" note inside book.1
- Oric Bates2
- Orlandus de Fatiis1
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Ege65
- Over, Watson1
- Owen D. Young1
- P. Pigeot1
- Pangracius Chrewczer1
- Paolino Gianfilippi1