6. Lewis Meriwether, 1774–1809, U.S. explorer: leader of the Lewis and Clark expedition 1804–06.
7. Lewis (Percy) Wyndham, 1884–1957, English writer and painter, born in the U.S.
Definition of 'lewis'
Princeton's WordNet
1. (noun)Lewis, Jerry Lee Lewis United States rock star singer and pianist (born in 1935)
2. (noun)Lewis, Carl Lewis, Frederick Carleton Lewis United States athlete who won gold medals at the Olympics for his skill in sprinting and jumping (born in 1961)
4. (noun)Lewis, John L. Lewis, John Llewelly Lewis United States laborleader who was president of the United Mine Workers of America from 1920 to 1960 and president of the Congress of Industrial Organizations from 1935 to 1940 (1880-1969)