Who created the fictional character that is the main protagonist and has an Uncle Henry in the Oz novels?
Uncle Henry (Oz): Uncle Henry is a fictional character from The Oz Books by L. Frank Baum. Uncle Henry (Oz):  He is the uncle of orphan Dorothy Gale and husband of Aunt Em, and lived with them on a farm in Kansas. Dorothy Gale: Dorothy Gale is a fictional character created by L. Frank Baum as the main protagonist in many of his "Oz" novels.
L. Frank Baum