Former Owner
- Jeremy C. Jackson1
- Jezzar Pasha1
- Joachim Guerrinus de Montefegatesio1
- Johan Laborya de Mossach1
- Johannes Patou1
- Johannes Vivianus1
- John Henry Ellis1
- John Hinsdale Scheide1
- John Josias Conybeare1
- John Wright1
- Laurence Vaux1
- 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