Former Owner
- House of Strozzi1
- J. A. Shanley1
- J. Martini1
- Jacob Henry Burn1
- James F. Drake1
- Joachim Guerrinus de Montefegatesio1
- Johan Meerman1
- John Rolls, 1st Baron Llangattock1
- John Thomas Beer1
- Lathrop C. Harper, Inc.1
- Leonello d'Este, Marquis of Ferrara1
- Libri, Edoardo, active 20th century1
- Lucien Magne1
- Marcela Gabriela1
- Marie Cleophe de Sollario1
- Marie de Albano1
- Matteo Barresi1
- Mayfair Rare Books and Manuscripts1
- Melk Abbey1
- Middle Hill Rare Books & Manuscripts AB (Stockholm, Sweden)1