 During the reign of King Felipe IV a Martin Guzmán y Rojas becomes Marquis de Montealegre.Early references to this surname record Eusebia de Montealegre, Margarita de Montealegre and Leocadio Maria de Montealegre as members of the Order of Carlos III.The title of Marques de Montealegre was granted to Martin de Guzmán in 1625 by king Felipe IV.