Former Owner
- John Boyd Thacher I1
- John Boykett Jarman1
- John Browne1
- John Caryll1
- John Henry Ellis1
- John Morgan1
- John Ruskin1
- John Topham1
- John Trotter Brockett1
- John West, 1st Earl De La Warr1
- John Wright1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Josephine Widener Wichfield1
- Lady Margaret Ayloffe1
- Lambertus Eerens1
- Laurence Kirby1
- Long Island Historical Society, Maine1
- Louis Bourguet1
- Louis César de La Baume Le Blanc1