Former Owner
- John Read Dore1
- John Ruskin1
- John Shirley1
- John Stow1
- John Taylor1
- John Topham1
- John Trotter Brockett1
- John West, 1st Earl De La Warr1
- John Willis1
- John de Vere, 12th Earl of Oxford1
- Joseph Barrois1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Judith Lady Montefiore College1
- Jules Bonhomme1
- Julie Florence de Cossette1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Klaus Dieter Dahmen1
- Kulturhistorisches Museum Magdeburg1
- Lady Margaret Ayloffe1