Former Owner
- John Taylor1
- John Thomas Beer1
- Joost Ritman1
- Julius de Cardelinis1
- Katharinenkirche, Nuremberg1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Kloster Bredelar1
- Kloster Rebdorf1
- Lancino Curti1
- Laura Hurd Motion1
- Leo Olschki1
- Leo S. Olschki Editore1
- Leopold Gruber1
- Leslie, John (c. 1840), bookseller1
- Lew David Feldman1
- Libreria la Bibliofila1
- Lionardo di Paolo Adimari1
- Lorenzo Antonio da Ponte1
- Louis César de La Baume Le Blanc1
- Lucien Gougy1