- Le Conte, John Eatton, 1784-18601
- Le Mone de Morgues, Jacques, 1533?-15881
- Le Rouge, Georges-Louis.1
- Lea, Philip, fl. 1683-17001
- Lemly, James H.1
- Lewger, John1
- Lewis, Samuel, 1753 or 1754-18221
- Louis Prang and Company1
- Lucas, Fielding, Jr., 1781-18541
- Lynch, W.J.1
- Magnus, Charles1
- Map Corporation of America (Boston, Mass.)1
- Marietta Housing Authority (Ga.)1
- Mason, Charles, 1728-17861
- McClellan, I. B1
- McDaniel, Henry T.1
- McDaniell, Henry T.1
- McGahan, Richard1
- McKinnon and Wright1
- McKinnon, John Surveyor1
