Former Owner
- Leonhardus Cuntius1
- Levi, David, active 19th century1
- London School of Jewish Studies1
- Louis Lamm1
- Ludovico Settala1
- Luigi Celotti1
- Luis Escobet1
- Luis Fernández de Córdoba y Aragón1
- Lundell Library1
- Lālajī Śarmaṇ1
- Madyan Qusuni1
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Manookjee Sorabjee Ashburner1
- Manuel Fernández del Castillo1
- Marquis of Astorga1
- Mary Lusher1
- Marāṭha, Raṅganātha1
- Matteo Luigi Canonici1
- Matthaeus Lupin1
- Matthew Donadski1