Former Owner
- Library of the Dominicans of Paris1
- Lorenzo Antonio da Ponte1
- Louis César de La Baume Le Blanc1
- Louis H. Silver1
- Louis Thompson Rowe1
- Lycée Louis-le-Grand1
- M. Haimmiller1
- Margaret Barclay Wilson1
- Marie-François Duchesne de Beaumanoir1
- Mark Lansburgh1
- Marsden J. Perry1
- Mary W. T. Dickinson1
- Michael Tomkinson1
- Michel Ferdinand d'Albert d'Ailly1
- Monastery of Saint Peter (Erfurt, Germany)1
- Morell Thurston1
- Morris H. Morgan1
- Nathan Comfort Starr1
- Niccolò Perotti1
- Nicolas Fowle1