Former Owner
- John Henry Ellis5
- John Henry Nash1
- John Henry Wrenn1
- John Hinely1
- John Hinsdale Scheide5
- John Rolls, 1st Baron Llangattock2
- John Savile1
- John William Burns1
- John William Harshberger1
- John de Vere, 12th Earl of Oxford1
- Joseph L. Lilly1
- Joseph Pope1
- Juan de Gayferos de Eguiraum1
- Kenneth X. Robbins1
- Laurence Kirby1
- Laurence William Hodson3
- Leicester Harmsworth1
- Leo Olschki1
- Leonello d'Este, Marquis of Ferrara2
- Lew David Feldman1