1. (

• Clark ,
• William_Clark

) United States explorer who (with Meriwether Lewis) led an expedition from St. Louis to the mouth of the Columbia River; Clark was responsible for making maps of the area (1770-1838) ;

2. (

• Clark ,
• Mark_Clark ,
• Mark_Wayne_Clark

) United States general who was Allied commander in Africa and Italy in World War II and was commander of the United Nations forces in Korea (1896-1984) ;

3. (

• Clark ,
• Kenneth_Clark ,
• Kenneth_Bancroft_Clark

) United States psychologist (born in Panama) whose research persuaded the Supreme Court that segregated schools were discriminatory (1914-2005) ;

4. (

• Clark ,
• Joe_Clark ,
• Charles_Joseph_Clark

) Canadian politician who served as prime minister (1939-) ;