Mississippi is named for the Mississippi river which forms its western boundary and empties into the Gulf of Mexico. The name roughly translated from Native American folklore means "Father of Waters." Mississippi was organized as a territory in 1798 and was admitted as the 20th state to join the Union on December 10, 1817. David Holmes was chosen as the first governor of the state.
15 Miss. Code. R. 9-99-1.2.1