Former Owner
- Jay Gould2
- Jean-Baptiste Denis Guyon de Sardière2
- Joachim Guerrinus de Montefegatesio2
- Joaquín Gómez de la Cortina2
- John Boykett Jarman2
- John Egerton, 1st Earl of Bridgewater2
- John Egerton, 2nd Earl of Bridgewater2
- John Egerton, 3rd Earl of Bridgewater2
- John Harvey Treat2
- John Patrick Auguste Madden2
- John Reiner2
- Joseph Haslewood2
- Josephine Widener Wichfield2
- Kartause Erfurt2
- Kenneth J. "Bud" Jennings2
- Louis XII of France2
- Louis de Gruuthuse2
- Ludwig Rosenthal's Antiquariaat2
- Messieurs Du Trieu2
- Michael Greenberg2