Former Owner
- Laurence Kirby1
- Laurence Vaux1
- Laurence William Hodson6
- Laurent Campagne1
- Laurentius van der Torqel1
- Law Society1
- Lawrence J. Schoenberg37
- LeMare1
- Legoué1
- Lehn of Denmark1
- Leicester Harmsworth6
- Leo Olschki7
- Leo S. Olschki Editore10
- Leonard Grey, 1st Viscount Grane1
- Leonardo Bruni1
- Leonardo Lapiccirella2
- Leonardo Loredan1
- Leonardus Martinotius1
- Leonello d'Este, Marquis of Ferrara4
- Leonhardus Cuntius1