The Valencian chronicle of the thirteenth century which says that: “the Borja to the number of eight hastened to Valencia to serve the king,” adds that “all, without exception, bore on their shields a bull on a golden ground.” Thus we find the Borgia arms clearly defined at this early date, and two hundred years later Calixtus III. used the same arms with a border of gules charged with eight oriflammes; finally Alexander VI. added to his escutcheon the arms of the Doms, his paternal grandmother’s family, three bands azure on a field of gold, which are the arms of Sibilla Doms, of Catalonia, wife of Rodrigo Gil de Borja, brother of Domingo. The offspring of this union, Jofre de Borja y Doms, father of Rodrigo Borgia, therefore had the right to place the three bands azure of the house of Doms by the side of the Borgia bull, and this he did. Rodrigo Borgia therefore was the son of Jofre de Borja y Doms and Isabella de Borja, who were first cousins; and he was the nephew of Calixtus III., his mother’s brother. All the descendants of Alexander VI. used the arms which he had engraved on his pontifical seal and which by his order Pinturicchio painted in the Appartamento Borgia in the Vatican. When Lucretia Borgia, through her marriage with Alfonso d’Este, became Duchess of Ferrara, she added to her arms the eagle of the House of Este and also the pontifical keys, and when her brother Caesar, on his marriage with Charlotte d’Albret, was made Duke of Valentinois, he adopted the lilies of France, although he should have taken the arms of Navarre. Now, what connection had the Lanzol with the Borgia, and what caused the curious mistake regarding the name of Rodrigo Borgia’s father? Don Rodrigo de Borgia, later Alexander VI., had three sisters, one of whom, Doña Juana, married P. Guillem Lanzol de Romani and bore him a son, Don Jofre Lanzol y Borja, who married Doña Juana de Moncada and by her had a son, Don Rodrigo Lanzol, who, instead of calling himself Lanzol y Moncada, as he should have done, took the name of Borgia, which was that of his grandmother as well as of his great-grandmother, Isabella, the sister of Calixtus III., and it was this Rodrigo Lanzol, who incorrectly called himself Borgia, whose name finally, in some unaccountable way, became confused with that of Rodrigo Borja y Borja, subsequently Alexander VI., and the error has persisted for centuries. Such is Yriarte’s explanation. The evidence furnished by the arms is substantiated by the Valencian chronicles and by records in the archives of Osuna. The Borgias were Spanish and such they remained throughout their long and infamous career in Italy, and they were always supported by a powerful Castillian party.