- Leaming, James R. (James Rosebrugh), 1820-1892, author4
- Lee, Benjamin, 1833-1913, author4
- Lee, Charles A. (Charles Alfred), 1801-18724
- Leffmann, Henry, 1847-19304
- Lehmann, Karl Gotthelf, 1812-18634
- Leidy, Joseph, Jr., 1866-19324
- Lente, Frederick D. (Frederick Divoux), 1823-18834
- Levy, Robert, 1864-19454
- Lewis, Daniel, 1846-1919, author4
- Lewis, Winslow, 1799-18754
- Lincoln, David F. (David Francis), 1841-1916, author4
- Lloyd, James Hendrie, 1853- author4
- Logan, Thos. M. (Thomas Muldrup), 1808-18764
- Longshore, J. S. (Joseph Skelton), 1809-18794
- Loring, Edward G. (Edward Greeley), 1837-1888, author4
- Ludlam, R. (Reuben), 1831-1899, author4
- Lusk, William Thompson, 1838-1897, author4
- MacLaren, Archibald, 1858-1924 author4
- Macedo, Joaquim Manuel de, 1820-1882 author4
- Mackall, Louis, 1801-1876, author4