That's not true Mademoiselle Lilo! "Chrifa" It's not given to ladies of the royal family because they are royals and it dosen't mean but any meaning a level inside of the royal family, but because the Alaouite family's ancestor is a descendant of the prophete, it was the reason why Moulay Ali Sharif, the ancestor of Alaouites, was made in the begining Imam in Tafilalt region, and later the leader of Morocco's ruling family after the decline of the Saadiyins dynasty!
There are many moroccan families who are not royals, and they are sherifian also, they are called "Charif (a)" or "Sharif (a)", because they have an ancestor who is a descendant of the prophete of Islam Mohamed Sws.