Former Owner
- John Dozier Gordan1
- John Holt1
- John Hope, 1st Marquess of Linlithgow1
- John Ingle Dredge1
- John William Bradley1
- Karen L. Gould1
- Karl F. Morrison1
- Katherine Somerset Wyttenbach Fenwick1
- LeMare1
- Leicester Harmsworth1
- Leo Olschki1
- Lepeletier de Rosanbo1
- Library of the Dominicans of Paris1
- Linda Ehrsam Voigts1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Luigi Celotti1
- M. Haimmiller1
- Magby, H1
- Marcel Mirgodin1
- Marvin-L. Colker1