Alanus de Rupe ; was a Roman Catholic theologian noted for his views on prayer. Some writers claim him as a native of Germany, others of Belgium; but his disciple, Cornelius Sneek, says that he was born in Brittany. He died at Zwolle.

Saint Dominic,, also known as Dominic de Guzmán, was a Castilian Catholic priest and the founder of the Dominican Order. He is the patron saint of astronomers and natural scientists, and he and his order are traditionally credited with spreading and popularizing the rosary. He is alternatively called Dominic of Osma, Dominic of Caleruega, and Domingo Félix de Guzmán.