Famous People: Jack Nicholsonwiki (Actor, 1937, United States), Jack Londonwiki (Writer, 1876, United States), Jack the Ripperwiki (Extremist, 1850, United Kingdom), Jack Kerouacwiki (Writer, 1922, United States), Jack Lemmonwiki (Actor, 1925, United States), Jack Blackwiki (Actor, 1969, United States), Jack Kilbywiki (Engineer, 1923, United States), Jack W. Szostakwiki (Biologist, 1952, United Kingdom), Jack Rubywiki (Mafioso, 1911, United States), Jack Steinbergerwiki (Physicist, 1921, Germany)