Former Owner
- John Lee1
- John Lumley, 1st Baron Lumley1
- John Pery1
- John Roland Abbey1
- John Rolls, 1st Baron Llangattock1
- John Ruskin1
- John Shirley1
- John Sidney Hawkins1
- John Stirton1
- John Stow1
- John Taylor1
- Joseph Barrois1
- Joseph H. Haines1
- Joseph Jekyll1
- Juan de Gayferos de Eguiraum1
- Julian I. Edison1
- Julie Florence de Cossette1
- Justin MacCarthy Reagh1
- Kaikhusroo Minocher Jamaspasa1
- King Lawrence Parker1