Former Owner
- John Harvey Treat1
- John Henry Ellis2
- John James Lewis1
- John Morgan1
- John Read Dore1
- John Rolls, 1st Baron Llangattock3
- John Thomas Beer1
- John West, 1st Earl De La Warr1
- John Wright1
- Joseph E. Widener6
- Josephine Widener Wichfield1
- Jérôme Pichon1
- Lambertus Eerens1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Laurent Campagne1
- Laurentius van der Torqel1
- Lawrence J. Schoenberg7
- Legoué1
- Leonello d'Este, Marquis of Ferrara2