Former Owner
- Laurence Vaux1
- Lawrence J. Schoenberg8
- Leicester Harmsworth1
- Leo Olschki1
- Leonardo Loredan1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Louis Loewe1
- Louis XII of France1
- Madyan Qusuni1
- Maggs Bros Ltd1
- Marco da Bologna1
- Marvin-L. Colker3
- Matteo Luigi Canonici1
- Mayer Sulzberger2
- Meschatin La Faye family1
- Michael Tomkinson1
- Mikhail Golitsyn1
- Milton Fischmann8
- Muḥammad al-Raʼīs1
- Muḥammad ʻAbd al-Ḥayy ibn ʻAbd al-Kabīr al-Kinānī al-Ḥasanī1