William Joseph Brennan Jr. was an American lawyer and jurist who served as an associate justice of the Supreme Court of the United States from 1956 to 1990. He was the eighth-longest serving justice in Supreme Court history, and was known for being a leader of the Court's liberal wing. Born: April 25, 1906 Died: July 24, 1997 In office: October 15, 1956 – July 20, 1990 Wiki link