Former Owner
- Jean-Baptiste Denis Guyon de Sardière1
- Jean-Louis Girardin de Vauvré1
- Jeremiah Styles1
- Jeremy C. Jackson1
- Jeronimus Maelens1
- Joachim Guerrinus de Montefegatesio1
- Johannes Abezier1
- Johannes de Helb1
- Johem Spiess1
- John Browne1
- John Fletcher Hurst1
- John Morgan1
- John Peacock1
- John Read Dore1
- John Ruskin1
- John Topham1
- John West, 1st Earl De La Warr1
- John Willis1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Lady Margaret Ayloffe1