References are to be found to the surnames Iranzo and Pérez-Duque in the district of Utiel-Requena soon after the conquest of the area from the Moors by King Fernando III of Castile in the 13th century.

In 1429, the Iranzo family received a grant of nobility from King Juan II of Castile.

In 1646, Don Pedro Yuste Iranzo received letters patent from King Philip IV of Hapsburg appointing him High Sheriff of the Town of Utiel, with the right to bear arms.

On the Pérez-Duque family, Enrique Herrero y Moral’s History of Requena, written in 1890, describing the medieval blazoned houses in the old city, says “…that of the Palace of Fernando Pérez-Duque, as it is known, …whose lords are descended from the first settler knights”.

The present house of the Iranzo Pérez-Duque family in Requena was built in 1794, and is classified as a Cultural Heritage site by the Valencia Regional Government.