Former Owner
- James Lyell1
- James Tanis1
- Jean E. Austin1
- Joachim Guerrinus de Montefegatesio1
- Johann David Baier1
- Johannes de Helb1
- Johem Spiess1
- John A. Murphy1
- John Dozier Gordan1
- John Fletcher Hurst1
- John Lee1
- John Read Dore1
- John Stow1
- John Taylor1
- John Wright1
- Judith Lady Montefiore College1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Lambach Abbey1
- Lancino Curti1
- Laura Hurd Motion1