Former Owner
- John Bohn1
- John C. Jackson1
- John Church1
- John Edgar Ker1
- John Hinely1
- John James Lewis1
- John Leeche1
- John Patteson1
- John Roland Abbey1
- John Ruskin1
- John William Harshberger1
- Joseph Barrois1
- Joseph Pope1
- Kloster Rebdorf1
- Lambach Abbey1
- Leicester Harmsworth1
- Leo Olschki1
- Lionel Tollemache, 4th Earl of Dysart1
- Llanthony Priory1
- Lucrezio Palladio degli Olivi1