Former Owner
- John Wright1
- Joseph François René de Kergariou1
- Joseph Jekyll1
- Joseph Whitney1
- Josephine Widener Wichfield1
- Justin MacCarthy Reagh1
- Lady Margaret Ayloffe1
- Latham family1
- Lathrop Colgate Harper1
- Laurent Campagne1
- Lawrence J. Schoenberg1
- Legoué1
- Libri, Edoardo, active 20th century1
- Lisa Norris Elkins1
- Long Island Historical Society, Maine1
- Louis XIV of France1
- Lutheran Theological Seminary at Philadelphia1
- Lydia Thompson Morris1
- Madame Théophile Belin1
- Maksymilian Mielzynski1