Sarah's son, Carlos Martínez de Irujo, 2nd Marquis of Casa Irujo, would later become Prime Minister of Spain.
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#Carlos Martínez de Irujo, 1st Marquis of Casa Irujo, 1763–1824
"He was an obstinate, impetuous and rather vain little person with reddish hair; enormously wealthy, endlessly touchy, extremely intelligent and vastly attractive … he liked America, he understood it and enjoyed it; he was tremendously popular at Philadelphia, and at Washington when he condescended to appear there; he was on intimate terms at the President's House.
He was son of the diplomat Carlos Martínez de Irujo y Erice, 1st Marquis of Casa Irujo, and his wife Sarah MacKean, daughter of the Pennsylvania governor Thomas McKean.