Former Owner
- J. & J. Leighton3
- J. C. Hanks2
- J. Meade Falkner1
- J. Palmer1
- Jacob Dackomb1
- James & Mary Lee Tregaskis (Firm)1
- James Albert FitzSimmons2
- James Clerke1
- James F. Drake1
- James Halliwell-Phillipps4
- James Ley, 1st Earl of Marlborough1
- James Lyell2
- James Rathwell Page1
- James Sotheby1
- James Tregaskis4
- Jeremy C. Jackson1
- Johannes Lethe1
- John A. Savage Jr.1
- John Alexander Stewart1
- John Arndell (fl. 1498)1