| Jalmari Lahdensuo | 1880–1931 | 1 |
| Henry Charles Lahee | 1856–1953 | 1 |
| A. H. (Alexander Hamilton) Laidlaw | 1869–1908 | 1 |
| David Laing | 1793–1878 | 1 |
| Gordon Jennings Laing | 1869–1945 | 1 |
| S. (Samuel) Laing | 1812–1897 | 1 |
| Osmo Lajula | 1874–1935 | 1 |
| Kirsopp Lake | 1872–1946 | 1 |
| Adolphe Lalauze | 1838–1906 | 1 |
| Lamairesse | 1817–1898 | 1 |
| Alphonse de Lamartine | 1790–1869 | 5 |
| Valentín Lamas Carvajal | 1849–1906 | 1 |
| Charles Lamb | 1775–1834 | 12 |
| Mary Lamb | 1764–1847 | 9 |
| Lamballe, Marie Thérèse Louise de Savoie-Carignan, princesse de | 1749–1792 | 9 |
| Victor Ralph Lambdin | 1876–1963 | 1 |
| Mrs. Lambert Chambers | 1878–1960 | 1 |
| L. H. J. Lamberts Hurrelbrinck | 1856–1941 | 1 |
| Lamothe-Langon, Etienne-Léon, baron de | 1786–1864 | 2 |
| Archibald Lampman | 1861–1899 | 3 |
| Louise Lamprey | 1869–1951 | 2 |
| O. E. Lampén | 1880–1925 | 1 |
| Etienne Lamy | 1845–1919 | 1 |
| Rodolfo Amedeo Lanciani | 1847–1929 | 1 |
| Louis A. Landa | born 1901 | 1 |
| Robert Thomas Landells | 1833–1877 | 1 |
| Frederick Landis | 1872–1934 | 1 |
| Isaac Landman | 1880–1946 | 1 |
| Arnold Henry Savage Landor | 1865–1924 | 4 |
| Edward Wilson Landor | 1811–1878 | 1 |
| Walter Savage Landor | 1775–1864 | 4 |
| William Landsborough | 1825–1886 | 1 |
| Thomas Landseer | 1795–1880 | 1 |
| Elinor Macartney Lane | 1864–1909 | 1 |
| Franklin K. Lane | 1864–1921 | 1 |
| John Lane | 1854–1925 | 1 |
| Lunsford Lane | 1803–1879 | 1 |
| Lane, William Arbuthnot, Sir | 1856–1943 | 1 |
| Stanley Lane-Poole | 1854–1931 | 1 |
| Allen Kim Lang | born 1928 | 2 |
| Andrew Lang | 1844–1912 | 77 |
| Jean Lang | 1867–1932 | 3 |
| John Lang | 1849–1917 | 1 |
| Rosamond Langbridge | 1880–1964 | — |
| Stephen Langdon | 1876–1937 | 1 |
| Algot Lange | 1884–1904 | 1 |
| Ina Lange | 1846–1930 | 3 |
| Freddie Langeler | 1899–1948 | 1 |
| Nathaniel Pitt Langford | 1832–1911 | 1 |
| Norman F. Langford | born 1914 | 1 |
| L. L. (Lorenzo Lorraine) Langstroth | 1810–1895 | 1 |
| H. H. (Hugh Hornby) Langton | 1862–1953 | 11 |
| Sidney Lanier | 1842–1881 | 2 |
| Robert Lansing | 1864–1928 | 1 |
| Lucy Larcom | 1824–1893 | 1 |
| Ring Lardner | 1885–1933 | 3 |
| Léonce de Larmandie | 1851–1921 | 1 |
| Otto Larssen | 1864–1910 | — |
| Edward Lasker | 1885–1981 | 3 |
| Harold J. (Harold Joseph) Laski | 1893–1950 | 1 |
| Alberto Lasplaces | born 1887 | 1 |
| Maiju Lassila | 1868–1918 | 8 |
| Jean Baptiste Antoine Lassus | 1807–1857 | 1 |
| John Holladay Latané | 1869–1932 | 1 |
| Mary A. (Mary Artemisia) Lathbury | 1841–1913 | 1 |
| George Parsons Lathrop | 1851–1898 | 3 |
| Rose Hawthorne Lathrop | 1851–1926 | 2 |
| Elizabeth Wormeley Latimer | 1822–1904 | 1 |
| Andreas Latzko | 1876–1943 | 1 |
| Lauder, Harry, Sir | 1870–1950 | 2 |
| Philippe Lauer | 1874–1953 | 1 |
| William B. Laughead | 1882–1958 | 1 |
| Clara E. (Clara Elizabeth) Laughlin | 1873–1941 | 3 |
| John Knox Laughton | 1830–1915 | 1 |
| Keith Laumer | 1925–1993 | 3 |
| L. de (Louis) Launay | 1860–1938 | 1 |
| Emile Laurent | 1861–1904 | 1 |
| G. B. (George Brenton) Laurie | 1867–1915 | 1 |
| Thomas Laurie | 1821–1897 | 1 |
| Agnes C. Laut | 1871–1936 | 7 |