Former Owner
- John Eliot Hodgkin1
- John Hope, 1st Marquess of Linlithgow1
- John Payne Collier1
- John Shelton Lawrence1
- John Towneley1
- Jorge de Ataíde1
- Joseph Barrois1
- Joseph Ernst Koch-Sternfeld1
- Joseph Franz Gross1
- Joseph Halle Schaffner1
- Joseph Neeld1
- Joseph Pope1
- Juan Antonio de la Reguera1
- Juan de Aillon1
- Juan de Torquemada1
- Jón Þorstensson1
- Lady Frances Bentinck1
- Lajos Graf Apponyi de Nagy-Appony1
- Leo Olschki1
- Leonardo Bruni1