'''Spencer Darwin Pettis''' (1802{{spnd}}August 28, 1831) was a U.S. Representative from [[Missouri]] andserving from 1828 until his assassination. He was also the fourth [[Missouri Secretary of State]]. HePettis is best known, however, for being a participant in a fatal duel with Major [[Thomas Biddle]]. [[Pettis County, Missouri]], is named in his honor.<ref>{{cite book | url=https://books.google.com/books?id=RfAuAAAAYAAJ&pg=PA339 | title=How Missouri Counties, Towns and Streams Were Named | publisher=The State Historical Society of Missouri | author=Eaton, David Wolfe | year=1917 | pages=339}}</ref>
