Former Owner
- Johem Spiess1
- John Boykett Jarman1
- John Eliot Hodgkin1
- John Estmond1
- John Fletcher Hurst1
- John Ives1
- John Morgan1
- John Read Dore1
- John Ruskin1
- John Walker1
- Joseph Mayner1
- Kloster Kuringen1
- Laurent Campagne1
- LeMare1
- Legoué1
- Leonardus Martinotius1
- Lepeletier de Rosanbo1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Lodovicus Saltariellus1