Former Owner
- John Borthwick, 14th of Crookston1
- John Boyd Thacher I1
- John Boykett Jarman1
- John Browne1
- John Campbell, 1st Marquess of Breadalbane1
- John Caryll1
- John Edgar Ker1
- John F. Fleming1
- John Ruskin1
- John Swyntoun1
- John Topham1
- John Trotter Brockett1
- John Wright1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Joseph Whitney1
- Julius Hess1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Latham family1