Former Owner
- John Bigham, 1st Viscount Mersey1
- John Boyd Thacher I1
- John Estmond1
- John Harvey Treat1
- John Haskell Shedd1
- John Henry Ellis1
- John Hinely1
- John Ives1
- John Lee1
- John Lumley, 1st Baron Lumley1
- John Stanley, 18th Earl of Derby1
- John Vyfyan1
- Joseph E. Widener1
- Josephine Widener Wichfield1
- Lane Theological Seminary1
- Lathrop C. Harper, Inc.1
- Laurence William Hodson1
- Leicester Harmsworth1
- Louis Lucien Bonaparte1
- Luigi Celotti1