Marquesses of Agoncillo Marqueses de Agoncillo Created by Alfonso XII, king of Spain Decree date 27-02-1875 Decree date 27-02-1875 First holder Enrique Frías Salazar y Torres-Vildósola, 1st marquess of Agoncillo * bp 1834 Records #3 Holders Family filter On/Off 1 Enrique Frías Salazar y Torres-Vildósola, 1st marquess of Agoncillo * bp 1834 2 Alfonso López-Montenegro y Helguero, 2° marqués de Agoncillo 3 Fernando López-Montenegro Helguero, 2nd marquess of Agoncillo * 1922 Sources Elenco de Grandezas y Titulos Nobiliarios Españoles 2002-pg. 28 Corrections and Updates To suggest a correction or an update. Click Here