Former Owner
- Mannucci family1
- Manoel Pereira da Sylva1
- Manookjee Sorabjee Ashburner1
- Mantell1
- Manuel John Johnson1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Marc-René de Voyer d'Argenson1
- Marcantonio Contarini1
- Marcantonio V Borghese1
- Marcel Mirgodin1
- Marcela Gabriela1
- Marchese Linterno1
- Marcianus F. Rossi1
- Marco Antonio Morosini1
- Marco da Bologna1
- Margaret Barclay Wilson2
- Margaret F. Woodward1
- Margaret Le Seigneur1
- Margareta van der Dycke1
- Margaretha van Cleyburg1