Former Owner
- Luis Fernández de Córdoba y Aragón1
- Luther Albertus Brewer1
- Lydia Thompson Morris1
- Lyon Cathedral1
- M. Haimmiller1
- M. Louise Stowell1
- Madeleine Cosman1
- Maggs Bros Ltd1
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manookjee Sorabjee Ashburner1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Manṣūr, Abū al-Faz̤l ibn Ghiyāth al-Dīn1
- Marcus Jastrow16
- Maria Riddell1
- Mario Maffei1
- Markus Fugger1
- Marvin-L. Colker1
- Mary Augusta Strachey1