Former Owner
- K. B. Starkie1
- Katherine Petersen1
- Katherine Somerset Wyttenbach Fenwick1
- Lathrop C. Harper, Inc.1
- Lathrop Colgate Harper1
- Laurence Vaux1
- Leicester Harmsworth1
- Leo Olschki1
- Lew David Feldman1
- Linda Ehrsam Voigts1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Louis Charles Karpinski1
- Louis H. Silver1
- Louis XII of France1
- Louis d'Harcourt1
- Lucien Delamarre1
- Lycée Louis-le-Grand1
- Léon Techener1
- M. Lee1
- M. Pierre Guarin1