Former Owner
- Maheśa1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Margaret Barclay Wilson1
- Maria Riddell1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marienstiftsgymnasium1
- Markus Fugger1
- Marsden J. Perry1
- Mary Augusta Strachey1
- Mary Shalom Karo1
- Mauni, Bālaṃbhaṭa1
- Mazliah Finzi1
- Maḥmūd al-Ustādār, d. 1396 or 71
- Medingen Abbey1
- Menno Hertzberger1
- Michael Bernays1
- Michael Greenberg1