Former Owner
- Jesuit College of San Bartolomeo1
- Johannes Baptista Siccus1
- John Bolton1
- John C. Jackson1
- John Camp Williams1
- John D. Stanitz1
- John Ruskin1
- John Ward, 1st Earl of Dudley1
- Julie Florence de Cossette1
- Katherine Somerset Wyttenbach Fenwick1
- Lathrop C. Harper, Inc.1
- Leo Olschki1
- Libreria antiquaria Hoepli1
- Lionardo di Paolo Adimari1
- Lorenzo Antonio da Ponte1
- Ludwig Rosenthal's Antiquariaat1
- Luigi Celotti1
- Luigi Cora1
- M. Favia del Core1
- Maggs Bros Ltd1