The fiscal inventory carried out after the Castilian invasion of the Kingdom of Navarra in 1512, reflected that the town of Fontellas did not pay "alcaba," which was a tax of the time, because its population was entirely Moslem.

[5] José Joaquín Vélaz de Medrano was granted the title of Marquess of Fontellas, however he had to pay 843,000 reales (roughly 3,358,000.00 USD) for the rights and processing fees.

[10] Marquess José Joaquín Vélaz de Medrano was the Lieutenant of the Royal Spanish Guards, 21st Lord of Autol and Yerga, 13th of Quel de Suso and Ordoño, and 14th of Fontellas and of the places and palaces of Mendillorri and Beúnzalarrea, the places of Amaláin, Lavaiz, and Villanueva, and of the palaces and mayorazgo (entailed estate) of Liédena, Aoiz, and Ripalda, Representative to the General Courts for the military arm, and Magistrate of Pamplona.

[11] [12] José Joaquín Vélaz de Medrano y Gante, VII Vizcount of Azpa, born on 2 March 1761 in Pamplona, successor of his brother, Knight of the Order of Saint John, died unmarried in Fontellas on 10 February 1826.

The first Marquess had two brothers: The Cortes Generales, Spain's legislative assembly, underwent significant changes during the 19th century, reflecting the shifting political landscape between absolutism and liberal constitutionalism.