Authors: L
- Shewell, Livingston Robert 1833-1904
- Shipley, J. L. -
- Shirley, Dame 1819-1906
- Shore, Henry N. 1847-1926
- Shurtleff, Bertrand 1897-1967
- Sienicka, Léonia -
- Sifferath, Nicholas Louis 1828-1898
- Sigea, Luisa -
- Sigourney, L. H. (Lydia Howard) 1791-1865
- Silberrad, Una L. 1872-1955
- Silberstein, Ludwik 1872-1948
- Sill, Louise Morgan -
- Silva, Luiz Augusto Rebello da 1822-1871
- Simmonds, P. L. (Peter Lund) 1814-1897
- Simonin, Louis 1830-1886
- Simon, Leon 1881-1965
- Simon, Lucien 1861-1945
- Simons, Lion 1862-1932
- Singmaster, Elsie 1879-1958
- Sinistrari, Ludovico Maria 1622-1701
- Sismondi, J.-C.-L. Simonde de (Jean-Charles-Léonard Simonde) 1773-1842
- Skanchy, Anthon L. (Anthon Lornsen) 1839-1914
- Skeats, Leonard 1874-1943
- Skinner, Constance Lindsay 1882-1939
- Skinner, Eleanor L. (Eleanor Louise) 1872-
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