- Leloir, Isidore
- Lemaître
- Levié, Jacob (aka Adolphe Levié)
- Lewis, J.
- Leyat
- Lightfoot, Peter
- Ligny, Ad.
- Linton, Henry Duff
- Linton, William James
- Lion, Jules
- Louis, A.
- Loutrel, Victor
- Lowry, Joseph Wilson
- Lupton, Thomas Goff
- Lyouns, H. W.
- M. & N. Hanhart
- M. Murguia y Cía.
- Maguire, Henry Calton
- Maile, George
- Manceau, Alexandre
- Mar, Léopold
- Marichal
- Marie, Alexandre Léon
- Marks, W.
- Marvy, Louis
- Massard, Léopold
- Matthis, Charles-Émile
- Mauduit, Charles
- Maurand, Charles
- Mayer, Auguste Etienne François
- Measom, William Frederick
- Méaulle, Fortuné-Louis
- Michel
- Michelet
- Midderich
- Miller, William