Former Owner
- John Morgan1
- John Morley1
- John Peacock1
- John Read Dore1
- John Rolls, 1st Baron Llangattock3
- John Ruskin1
- John Shirley1
- John Stow1
- John Taylor1
- John Topham1
- John Trotter Brockett1
- John West, 1st Earl De La Warr1
- John Willis1
- John Wright2
- John de Vere, 12th Earl of Oxford1
- Joseph Barrois1
- Joseph E. Widener7
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Josephine Widener Wichfield2