Former Owner
- Godefroy Honore1
- Harry Peach1
- Heathcote William Garrod1
- Henry Cestole1
- Henry Ellis Allen1
- Henry Yates Thompson1
- J. A. Dortmond1
- J. Martini1
- J. T. Payne1
- J. Techener1
- James H. Stewart1
- Jay Gould1
- Jesuit College of San Bartolomeo1
- Joachim Guerrinus de Montefegatesio1
- John Hope, 1st Marquess of Linlithgow1
- John Morgan1
- Lathrop C. Harper, Inc.1
- Leo Olschki1
- Leonello d'Este, Marquis of Ferrara1
- Libri, Edoardo, active 20th century1