The Aliʻi nui of Maui was the supreme ruler of the islands of Maui, one of the four main Hawaiian Islands as well as the smaller island of Lanai. The title is the same as that of the Aliʻi nui of the other islands. The title or phrase Mōʻī is sometimes used for the title of the monarchs of Maui; however, it is not an ancient word in the Hawaiian language and has origins in the mid 19th century. The only monarchs to officially hold the title of Mōʻī are Kalākaua and his sister Liliuokalani.