Former Owner
- Lisa Unger Baskin1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Lorenzo Antonio da Ponte1
- Lorenzo de Olivera1
- Louis Charles Karpinski1
- Louis César de La Baume Le Blanc1
- Louis Lucien Bonaparte1
- Lucrezio Palladio degli Olivi1
- Luigi Clerici1
- Luis Mayora1
- M. Favia del Core1
- Magby, H1
- Manoel S. Pinto1
- Margaret of Croy1
- Maria Ludovica Favia del Core Borromeo1
- Mark Lansburgh1
- Martin Schøyen1
- Matthaeus Lupin1
- McCormick Theological Seminary1
- Melchior Daniel Neubronner1