Alia Atreides/DE was worshipped during her life, as a reflected image of Muad'dib, carrying on his work. But after her death she was worshipped as a divine godhead of her own. Her title as "The Womb of Heaven" was adopted by the Cults as a far more hallowed connotation (her lesser titles were discarded). The followers of Alia followed The Book of Alia.