Former Owner
- L. Paganthus1
- Lambach Abbey1
- Lancino Curti1
- Laura Hurd Motion1
- Laurence Harman King-Harman1
- Leigh Baker1
- Leo Olschki1
- Leo S. Olschki Editore1
- Leonard S. Unger1
- Leonardus Martinotius1
- Leonhardus Cuntius1
- Leopold Gruber1
- Leslie, John (c. 1840), bookseller1
- Levi, David, active 19th century1
- Lew David Feldman1
- Librairie Tross1
- Lionardo di Paolo Adimari1
- Lohanī, Viṣṇudatta1
- Lorenzo Antonio da Ponte1
- Louis Charles Karpinski1