Former Owner
- John Harvey Treat1
- John Haskell Shedd1
- John Henry Ellis1
- John James Lewis1
- John Rolls, 1st Baron Llangattock1
- John Thomas Beer1
- John William Harshberger1
- Joseph Pope1
- Julie Florence de Cossette1
- Lane Theological Seminary1
- Laurence Kirby1
- Leonello d'Este, Marquis of Ferrara1
- Lorenzo de Olivera1
- Louis N. Cassett1
- Luigi Serra di Cassano1
- Lyon Cathedral1
- Maggs Bros Ltd1
- Manookjee Sorabjee Ashburner1
- Margaret of Croy1
- Marie-Caroline of Bourbon-Two Sicilies, Duchess of Berry1