Dorothy’s last name in ‘The Wizard of Oz’ is Gale. This is mentioned in the original 1900 book by L. Frank Baum, ‘The Wonderful Wizard of Oz.’ Dorothy Gale is the protagonist who is swept away from her Kansas home by a tornado and finds herself in the magical Land of Oz. The name ‘Gale’ is fitting as it refers to a strong wind, which ties into the story’s beginning where a cyclone transports her to Oz.