Former Owner
- John Read Dore1
- John Stow1
- John Thomas Beer1
- John Topham1
- John Wallop, Viscount Lymington1
- John Wright1
- Joost Ritman1
- Joseph Anton Koch1
- Joseph Haslewood1
- Joseph Mayner1
- José Fernando Ramírez1
- Judith Lady Montefiore College1
- Julius Heinrich Jeidels1
- Julius de Cardelinis1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Kloster Bredelar1
- Kloster Rebdorf1
- L. Paganthus1
- Lambach Abbey1
- Lancino Curti1