Agustín Muñoz, 1st Duke of Tarancón

Don Agustín Maria Muñoz y de Borbon, 1st Duke of Tarancón, Grandee of Spain (es: Don Agustín Maria Muñoz, Duque de Tarancón) (15 March 1837 – 15 July 1855) was the eldest son of Maria Christina, Queen mother and Regent of Spain, and of her morganatic second husband Agustín Fernando Muñoz, Duke of Riánsares (made duke in 1844 by his step-daughter, Isabella II of Spain).

Biography Muñoz was born in Madrid while his mother was still Regent of Spain and his parents' marriage was not publicly known. In 1840 Muñoz went with his parents into exile in France. In 1842 his mother purchased the Château de Malmaison where Muñoz and his siblings grew up.

In 1844 Muñoz's half-sister Queen Isabella II of Spain was declared to be of age. On 19 November 1847, Isabella gave to Muñoz the title Duke of Tarancón (duque de Tarancón) which was attached to a Grandeeship. On 10 June 1849 she gave Muñoz a second title, Viscount of Rostrollano (vizconde de Rostrollano).