"his royal highness prince leonard i of hutt" was the style that has been used by leonard george casley since his creation of the hutt river principality. prince leonard was married to "her royal highness princess shirley of hutt, dame of the rose of sharon" (née shirley butler). they have seven adult children, among them is "crown prince ian" (born 1947) who is the prime minister of the principality, and is prince leonard's heir apparent.