Answer
The answer is "Don Alexandro Malaspina." He was an Italian-born Spanish naval officer and explorer who led the Spanish Malaspina Expedition to the Americas and the Philippines from 1789 to 1794. He used the name "Don Alexandro Malaspina" when signing his letters in Spanish, adopting the Spanish spelling of his first name "Alejandro" as "Alexandro." He is primarily known for this form of his name in historical contexts.