Former Owner
- Lydia Thompson Morris1
- Mademoiselle de Malberghe1
- Marchese Porri-Carcani1
- Margaret Le Seigneur1
- Marguerite of Lorraine1
- Mario Maffei1
- Marion Lawrence1
- Marvin-L. Colker1
- Mary, Queen of Scots1
- Matthew Bloxam1
- Matthew Donadski1
- Matthew Simpson Parkhurst1
- Maurice Johnson1
- Menno Hertzberger1
- Mercantile Library Company1
- Meschatin La Faye family1
- Michaeliskonvent1
- Michel Chasles1
- Morot1
- Mrs. E.J. Hooper1