Former Owner
- John Browne1
- John Caryll1
- John F. Fleming1
- John Harvey Treat1
- John Henry Ellis1
- John Henry Wrenn1
- John Herbst1
- John Hope, 1st Marquess of Linlithgow1
- John Morgan1
- John Ruskin1
- John Topham1
- John Trotter Brockett1
- John Wright1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Joseph Marie Sormani1
- Joseph Whitney1
- Josephine Widener Wichfield1
- Julie de Busnel1
- Lady Margaret Ayloffe1