| The Marquess of Casa Irujo | |
| Office: | Prime Minister of Spain |
| Term Start: | 28 January 1847 |
| Term End: | 28 March 1847 |
| Predecessor: | Francisco Javier Isturiz y Montero |
| Successor: | Joaquin Francisco Pacheco |
| Birth Date: | 14 December 1802 |
| Birth Place: | Washington, D.C., United States |
| Death Date: | 26 December 1855 (53 years) |
| Death Place: | Madrid, Spain |
| Birthname: | Carlos Fernando Martínez de Irujo y Mckean |
| Nationality: | Spanish |
| Honorific Prefix: | The Most Excellent |
Don Carlos Fernando Martínez de Irujo y McKean, 2nd Marquess of Casa Irujo, jure uxoris Duke of Sotomayor, Grandee of Spain (14 December 1802 – 26 December 1855) was a Spanish noble and politician who served as Prime Minister of Spain. Additionally, he is a male line ancestor of the reigning duke of Alba.
Martínez de Irujo was born on 14 December 1802 in Washington, D.C. He was son of the diplomat Carlos Martínez de Irujo y Erice, 1st Marquess of Casa Irujo, and his wife Sarah McKean.[1]
His mother was the daughter of the Pennsylvania Governor and signer of the United States Declaration of Independence Thomas McKean and Pennsylvania First Lady Sarah Armitage McKean.[2]
Martínez de Irujo served as Prime Minister of Spain from 28 January 1847 to 28 March 1847, concurrently while serving as Minister of State. He again served as Minister of State from 23 October 1847 to 29 July 1848.
Don Carlos became a Grandee of Spain in 1844 through his marriage to Gabriela del Alcázar, 7th Duchess of Sotomayor through which he gained the courtesy title, Duke of Sotomayor. Together, they were the parents of two children:
Martínez de Irujo died on 26 December 1855 in Madrid.[3]
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