Former Owner
- Johann Michael Schiller1
- Johem Spiess1
- John Bohn1
- John Edgar Ker1
- John Fenn1
- John Hindley1
- John Lumley, 1st Baron Lumley1
- John Sidney Hawkins1
- John Taylor1
- Joseph Barrois1
- Joseph Mayner1
- José Antonio Conde1
- Leicester Harmsworth1
- Lepeletier de Rosanbo1
- Librairie Tross1
- Library of the Dominicans of Paris1
- Lorenzo Antonio da Ponte1
- Louis César de La Baume Le Blanc1
- Louis Thompson Rowe1
- M. Haimmiller1