Former Owner
- John Shelton Lawrence1
- John Sotheby1
- John Thomas Beer1
- John Towneley1
- John Ward, 1st Earl of Dudley1
- John William Harshberger1
- Jorge de Ataíde1
- Joseph Ernst Koch-Sternfeld1
- Joseph Franz Gross1
- Joseph Halle Schaffner1
- Joseph Neeld1
- Joseph Pope1
- Juan Antonio de la Reguera1
- Juan Burgueño1
- Juan de Aillon1
- Juan de Torquemada1
- Julian Burgueño1
- Julius de Cardelinis1
- Jérôme Pichon1
- Jón Þorstensson1