Former Owner
- Joseph L. Lilly2
- Joseph Pope2
- Josephine Widener Wichfield2
- Karl F. Morrison2
- Laurence William Hodson2
- Leonardo Lapiccirella2
- Librairie Damascène Morgand2
- Libreria la Bibliofila2
- Lionel Tollemache, 4th Earl of Dysart2
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn2
- London School of Jewish Studies2
- Louis XII of France2
- Lucien Gougy2
- Lucy Evans Chew2
- Ludwig Rosenthal's Antiquariaat2
- Luigi Arrigoni2
- Luigi Cora2
- Marchese Linterno2
- Marie-François Duchesne de Beaumanoir2
- Martin Schøyen2