Revillagigedo Island
The first European recorded as having sighted it was Spanish explorer Jacinto Caamaño in 1792; it was named the following year by George Vancouver for Juan Vicente de Güemes , 2nd Count of Revillagigedo , then viceroy of New Spain ( Mexico ) . 
<triplet> Juan Vicente de Güemes, 2nd Count of Revillagigedo <subj> New Spain <obj> position held