Former Owner
- Lundell Library1
- Luther Albertus Brewer1
- Lydia Thompson Morris1
- Lālajī Śarmaṇ1
- M. De La Tour1
- M. Louise Stowell1
- Madeleine Cosman1
- Madyan Qusuni2
- Madyājñika Devakṛṣṇa1
- Maggs Bros Ltd6
- Mahadevabhaṭṭa5
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Maheśa1
- Mahārāja Aditya Bahadur Dinha8
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manookjee Sorabjee Ashburner1
- Manuel Fernández del Castillo1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Margaret Barclay Wilson1