Former Owner
- Notre-Dame de Macourt monastery1
- Notre-Dame monastery (Ambert, France)1
- Novalesa Abbey1
- O. A. Bump1
- Oettingen-Wallerstein library1
- Ohio State University Center for Epigraphical and Palaeographical Studies1
- Ohio State University School of Music1
- Oliver Henry Perkins3
- Oliver R. Barrett2
- Omaha Public Library1
- 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
- Orlandus de Fatiis1
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Ege121
- Otto Haas1
- Otto Orren Fisher2
- Otto Vollbehr3
- Owen D. Young1
- P. Desq1
- P. J. De Mat1