since 1787 (8 August 1755 – 7 January 1807). Francisco Téllez-Girón, 10th Duke de Osuna since 1807 (6 October 1785 – 21 May 1820). Pedro de Alcántara Téllez-Girón y Beaufort-Spontin, 11th Duke of Osuna (1810–1844), also 14th Duke of the Infantado, died without issue. Mariano Téllez-Girón y Beaufort-Spontin, 12th Duke of Osuna (Madrid, 19 July 1814 – Beauraing, Belgium, 2 June 1882), also 15th Duke of the Infantado and brother of the 11th Duke. Pedro de Àlcantara Téllez-Girón y Fernández de Santillán, 13th Duke of Osuna (1812–1900). Luis María Téllez-Girón y Fernández de Córdoba, 14th Duke of Osuna (1870–1909). Mariano Téllez-Girón y Fernández de Córdoba, 15th Duke of Osuna. (1887–1931), brother of the 14th Duke. Married to Petra Duque de Estrada y Moreno. Angela Téllez-Girón y Duque de Estrada, 16th Duchess of Osuna (1925–2015), became duchess at the age of 6 years. Ángela María de Solís-Beaumont y Téllez-Girón. 17th Duchess of Osuna since 2016. Details Pedro Téllez-Girón, 1st Duke of Osuna : One of his daughters, María, (Moron de la Frontera, 1553–1608) married on 18 March 1570, Juan Fernández de Velasco, 5th Duke of Frías, and their daughter, known as Ana de Velasco y Girón married, on 17 June 1603, the Portuguese 7th Duke of Braganza, Teodósio II, (Vila Viçosa, Portugal, 28 February 1568 – Vila Viçosa, 29 November 1630). The outcome of this marriage between the Ana de Velasco y Téllez-Girón and the Duke Teodósio II, was that they were the parents of John IV of Portugal "the Restorer", (Vila Viçosa, 18 March 1604 – Lisbon, 6 November 1656), the first Braganza to be crowned King of Portugal, following the nacionalist coup against the Spanish Habsburgs, on 1 December 1640. It was alleged that being already a Duke, he fathered an illegitimate son, known as Gabriel Téllez, becoming an active Member and Travel Visitor of the Religious Orden de la Merced, and being known today as famous Spanish theatrical author Tirso de Molina, (1584 – Soria, 12 March 1648). Don Francisco Téllez-Girón, 6th Duke of Osuna : Married in 1694, aged 16, Maria Remigia Fernández de Velasco y Tovar, but there was not adult male issue. He was a supporter of King Philip V of Spain and plenipotentiary signer of the Treaty of Utrecht. Francisco de Borja Téllez-Girón y Pimentel, 10th Duke of Osuna : Painted by Goya as a child together with his eldest sister, Maria Joaquina Téllez-Girón