Francisco Diego Díaz de Quintanilla y de Hevía y Valdés

Francisco Diego Díaz de Quintanilla y de Hevía y Valdés, O.S.B. (4 October 1587 – 6 December 1656) was a Roman Catholic prelate who served as Bishop of Antequera, Oaxaca (1655–1656) and Bishop of Durango (1639–1655).

Francisco Diego Díaz de Quintanilla y de Hevía y Valdés was born in Oviedo, Spain on 4 October 1587 and ordained a priest in the Order of Saint Benedict. On 8 August 1639, he was appointed during the papacy of Pope Urban VIII as Bishop of Durango. On 8 January 1640, he was consecrated bishop by Juan de Palafox y Mendoza, Bishop of Tlaxcala, with Cristóbal Pérez Lazarraga y Maneli Viana, Bishop of Chiapas, and Mauro Diego de Tovar y Valle Maldonado, Bishop of Caracas, serving as co-consecrators.On 14 May 1655, he was appointed during the papacy of Pope Alexander VII as Bishop of Antequera, Oaxaca. He served as Bishop of Antequera, Oaxaca until his death on 6 December 1656.

While bishop, he was the principal consecrator of Pedro de Barrientos Lomelin, Bishop of Durango (1656); and Juan de Montiel, Bishop of Santiago de Cuba (1656).

• Cheney, David M. "Archdiocese of Durango". Catholic-Hierarchy.org. Retrieved June 16, 2018. (for Chronology of Bishops)
• Chow, Gabriel. "Archdiocese of Durango (Mexico)". GCatholic.org. Retrieved June 16, 2018. (for Chronology of Bishops)
• Cheney, David M. "Archdiocese of Antequera, Oaxaca". Catholic-Hierarchy.org. Retrieved March 25, 2018. (for Chronology of Bishops)
• Chow, Gabriel. "Metropolitan Archdiocese of Antequera". GCatholic.org. Retrieved March 25, 2018. (for Chronology of Bishops)