Arkansas is the state that has the six letter name of another U.S. state included within its own. The state name of Kansas is found in Arkansas. It is believed that the name Arkansas derives from the same root as the name for the state of Kansas.

The Kansa tribe of Native Americans were closely associated with the Sioux tribes of the Great Plains. The word Arkansas is from the french pronunciation for Arcansas. In 1881, the pronunciation of Arkansas with the final "s" being silent was made official by an act of the state legislature after a dispute arose between Arkansas's two U.S. senators as one favored the pronunciation as /ˈɑːrkənsɔː/ ar-kən-saw while the other favored /ɑːrˈkænzəs/ ar-kan-zəs.

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