This is false on both counts.

The word “Missouri” often has been construed to mean “muddy water” but the Smithsonian Institution Bureau of American Ethnology has stated it means “town of the large canoes,” and authorities have said the Indian syllables from which the word comes mean “wooden canoe people” or “he of the big canoe.”

Mississippi, meaning “great river” or “gathering-in of all the waters,” sometimes referred to as the “father of waters,”.