Former Owner
- Lehn of Denmark1
- Leicester Harmsworth1
- Leo Olschki3
- Leo S. Olschki Editore7
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonello d'Este, Marquis of Ferrara2
- Levi, David, active 19th century1
- Lew David Feldman1
- Lewis L. Gould9
- Libri, Edoardo, active 20th century1
- Lima Public Library1
- Linda Ehrsam Voigts2
- Lisa Kiser2
- Lodi Cathedral1
- Lodovicus Saltariellus1
- London School of Jewish Studies1
- Lorenzo Antonio da Ponte1
- Louis Bourguet1
- Louis Charles Karpinski1