Former Owner
- Jay Gould1
- Jesuit College of San Bartolomeo1
- Joachim Guerrinus de Montefegatesio1
- Joannes Angelus de Crema1
- Johan Gröf1
- Johan Meerman1
- Johann Heinrich van Ess1
- Johann Heinrich von Speyr-Passavant1
- Johannes Baptista Siccus1
- Johannes Betrus Ravenoldus1
- John Bolton1
- John Boyd Thacher I1
- John C. Jackson1
- John Carter1
- John Egerton, 1st Earl of Bridgewater1
- John Gunthorpe1
- John Henry Ellis1
- John Hope, 1st Marquess of Linlithgow1
- John Lee1
- John Morgan1