Rufus W. Peckham (November 8, 1838 – October 24, 1909) was an American lawyer and jurist who served as an Associate Justice of the U.S. Supreme Court from 1895 to 1909, and is the most recent Democratic nominee approved by a Republican-majority Senate. He was known for his strong use of substantive due process to invalidate regulations of business and property. Peckham's namesake father was also a lawyer and judge, and a U.S. Representative. His older brother, Wheeler Hazard Peckham (1833–1905), was one of the lawyers who prosecuted William M. Tweed and a failed nominee to the Supreme Court.