Former Owner
- Joachim, Baron von Windhag1
- Johan C. Jackson1
- Johannes Abezier1
- Johannes de Helb1
- Johem Spiess1
- John Boykett Jarman1
- John E. Burton1
- John Eliot Hodgkin1
- John Estmond1
- John Fletcher Hurst1
- John Henry Ellis1
- John Ives1
- John Morgan1
- John Read Dore1
- John Ruskin1
- John Walker1
- John West, 1st Earl De La Warr1
- Joseph Mayner1
- Juan de Londono1
- Jān Sipār Khān ibn Rustamdilkhān1