Former Owner
- John Edgar Ker1
- John Hinely1
- John Lee1
- John Patteson1
- John Roland Abbey1
- John Ruskin1
- John Sotheby1
- John Thomas Beer1
- John Ward, 1st Earl of Dudley1
- Juan Burgueño1
- Julian Burgueño1
- Julius de Cardelinis1
- Jérôme Pichon1
- Karl Hermann Berendt1
- Khammāsh, Aḥmad1
- Kloster Rebdorf1
- L. Paganthus1
- Lambach Abbey1
- Lancino Curti1
- Laurence William Hodson1