Former Owner
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Maheśa1
- Mahārāja Aditya Bahadur Dinha8
- Maksymilian Mielzynski1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Mannheimer Hofbibliothek1
- Manoel Pereira da Sylva1
- Manoel S. Pinto1
- Manookjee Sorabjee Ashburner1
- Manuel Fernández del Castillo3
- Manuel John Johnson1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Manṣūr, Abū al-Faz̤l ibn Ghiyāth al-Dīn1
- Marc-René de Voyer d'Argenson1
- Marcantonio Contarini1
- Marcantonio V Borghese1
- Marcela Gabriela1
- Marchese Linterno2
- Marchese Porri-Carcani1