Former Owner
- Johann Egolph1
- Johann Heinrich von Speyr-Passavant1
- Johannes Betrus Ravenoldus1
- John Alexander Stewart1
- John Boykett Jarman1
- John Burns1
- John C. Jackson1
- John Fenn1
- John Henry Nash1
- John Roland Abbey1
- John Ruskin1
- John Shelton Lawrence1
- John Sotheby1
- John Towneley1
- John Ward, 1st Earl of Dudley1
- Joseph Ernst Koch-Sternfeld1
- Juan Burgueño1
- Juan de Gayferos de Eguiraum1
- Juana I of Castile1
- Julian Burgueño1