Former Owner
- Michael Greenberg1
- Michael Tomkinson1
- Monastery of Saint Peter (Erfurt, Germany)1
- Morton Davis Mitchell1
- Mrs. Turnbull1
- Muḥammad ʻAbduh1
- Nancy McGrath1
- Nathan Comfort Starr1
- Naʻīm1
- Nell Wheeler1
- Nicholas Chevalier1
- Nicholas Herry1
- Notre-Dame de Macourt monastery1
- O. A. Bump1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Haas1
- Otto Orren Fisher1
- P. Desq1