Former Owner
- Malvezzi de' Medici1
- Manookjee Sorabjee Ashburner1
- Manuel Fernández del Castillo1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Maria Riddell1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Marienstiftsgymnasium1
- Markus Fugger1
- Mary Augusta Strachey1
- Mary Lusher1
- Marāṭha, Raṅganātha1
- Matthew Donadski1
- Mauni, Bālaṃbhaṭa1
- Maximilian Henry of Bavaria1
- Mazliah Finzi1
- Maḥmūd al-Ustādār, d. 1396 or 71
- Maḥmūd bin Nāṣir1
- Maḥmūd ibn al-Shaykh al-Fattāḥ1
- Menno Hertzberger1