Spanish military Governor of Buenos Aires, and the first Viceroy of the Río de la Plata
1715 CE
to 1778 CE
Pedro Antonio de Cevallos Cortés y Calderón, also spelled Ceballos (June 29, 1715 – December 26, 1778), is a Spanish military Governor of Buenos Aires between 1757 and 1766, and the first Viceroy of the Río de la Plata in 1776.