1. Sources

Gastón de la Cerda, 3rd Duke of Medinaceli, Grandee of Spain, (in full, {{lang-es|Don Gastón de la Cerda y Portugal, tercer duque de Medinaceli, segundo marqués de Cogolludo, segundo conde del Puerto de Santa María, Grande de España, señor de las villas de Deza, Enciso, Imón y Barahona, antes monje de la Orden de San Jerónimo, después caballero y comendador de la Orden de San Juan de Jerusalén, con honores de Gran Prior en la misma}}), (c. 1507 – 1552) was a Spanish nobleman.

He was the second son of Don Juan de la Cerda, 2nd Duke of Medinaceli, by first wife Mencía Manuel de Portugal. As a young man he became a monk in the Order of St. Jerome. In 1536 after the death of his elder brother Luis without issue he became the heir to the family titles, so he sought a Papal dispensation in order to marry and fulfill his family obligations. On 4 March 1540 he married María Sarmiento de la Cerda, a marriage that was eventually nulled on 30 August 1544, without issue.

Sources

• {{Cite web |url=http://grandesp.org.uk/historia/titulos/titintro.htm |title=Grandes de España |accessdate=15 October 2008 |author= |last=Hobbs |first=Nicolas |authorlink= |year=2007 |work= |publisher= |location= |pages= |language=Spanish |doi= |archiveurl= |archivedate= |quote= }}
• {{cite book |last=Instituto de Salazar y Castro |first= |authorlink= |editor= |others=periodic publication |title=Elenco de Grandezas y Titulos Nobiliarios Españoles |url= |format= |accessdate= |edition= |series= |volume= |origyear= |publisher= |location= |language=Spanish |isbn= |oclc= |doi= |id= |page= |pages= |chapter= |chapterurl= |quote= |ref= |bibcode= |laysummary= |laydate= |postscript= |lastauthoramp=}}

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