Former Owner
- John Stow1
- John Taylor1
- Joseph H. Haines1
- Joseph Jekyll1
- José Fernando Ramírez1
- Juan de Gayferos de Eguiraum1
- Justin MacCarthy Reagh1
- Jān Sipār Khān ibn Rustamdilkhān1
- Kaikhusroo Minocher Jamaspasa1
- Karbalāʼī Muḥammad Ḥusayn Qāsimʹābādī1
- Khouri, Elias Alexander1
- King Lawrence Parker1
- Laurence Vaux1
- Leonello d'Este, Marquis of Ferrara1
- Long Island Historical Society, Maine1
- Lorenzo Antonio da Ponte1
- Louis Herbert Gray1
- Louis Loewe1
- Louis XIV of France1
- Luigi Celotti1