Carson \c(a)-rson, car-son\ as a boy's name (also used as girl's name Carson), is pronounced KAR-sen. It is of Scottish and Old English origin, and the meaning of Carson is "son of the marsh-dwellers". Mainly Scottish surname. The first known bearer was a certain Robert de Carsan in the 13th century. In American, legendary Missouri frontiersman Kit Carson (19th century) was a scout and guide in the exploration of the West as well as an important factor in the Mexican War. Carson City, Nevada was named for him, and to this day, an aura of rakishness and daring clings to the name. TV hosts Johnny Carson, and Carson Daly.