Former Owner
- Leicester Harmsworth1
- Leonardo Lapiccirella1
- Lionel Tollemache, 4th Earl of Dysart1
- Llanthony Priory1
- Louis II, Count of Flanders1
- Louis N. Cassett1
- Ludwig Rosenthal1
- Lyon Cathedral1
- Léon Gruel1
- Maksymilian Mielzynski1
- Mannheimer Hofbibliothek1
- Mayfair Rare Books and Manuscripts1
- Maḥmūd al-Ustādār, d. 1396 or 71
- Michael Tomkinson1
- Monastery of Saint Peter (Erfurt, Germany)1
- Morton Davis Mitchell1
- Mrs. Turnbull1
- Muḥammad ʻAbduh1
- Muḥammad ʻĀrif Bīr Miʻmārān1
- Nathan Comfort Starr1