Ferdinand married for a second time to Maria Luisa de Silva y Fernández de Henestrosa, Duchess of Talavera de la Reina, daughter of Luis de Silva y Ferandez, 10th Count of Pie de Concha and his wife Maria de los Dolores Fernandez de Henestrosa y Fernández de Córdoba, on 1 October 1914 in Fuenterrabía, Spain.
Until 1566, the Diocese of Bayonne included much Spanish territory, i.e. the four Archpresbyteries of Baztan, Lerin, Bortziria in Navarre, and Hondarribia in Guipuzcoa, a remnant of Charlemagne's conquests beyond the Pyrenees.