Jacinto Caamaño Moraleja (1759-1825?) was the leader of the last great Spanish exploration of Alaska (then Russian America) and the Coast of British Columbia. He was a Knight of the Military Order of Calatrava. Born in Madrid, he came from an aristocratic Galician family, whose homestead was near Santiago de Compostela. His father was Juan Fernández de Caamaño, and his mother, Mariana Moraleja Alocen. He entered the Spanish Navy (Armada) as an adventurer at 18, and two years later he was an Ensign (Alférez de navio).
A few years later he formed part of a politico-commercial expedition to Constantinople to establish business relations with Turkey, Poland, and Russia. After a quick trip to Cuba in 1787, he was chosen by Juan Francisco de la Bodega y Quadra to go to the Pacific Coast of Mexico and the naval base of San Blas, the headquarters for the exploration of the Pacific Northwest. He was a Frigate Lieutenant (Teniente de Fragata) at the time. Alongside went his brother-in-law, Francisco de Eliza, who would distinguish himself as Governor of Fort San Miguel on Vancouver Island's Nootka Sound. On their ship to Mexico was the recently named Viceroy of New Spain, Don Juan Vicente de Güemes Padilla Horcasitas y Aguayo, 2nd Count of Revillagigedo. On February 3, 1790, Caamaño took part on an expedition to the Pacific Northwest. He was commanding the Nuestra Señora del Rosario (also known as the La Princesa), a 189-ton frigate built in San Blas for the exploration of the North. He did not go beyond Nootka on this voyage, but on his next one, in 1792, came as far as Bucareli Bay commanding the frigate Aránzazu, a corvette built at Cavite in the Philippines. By this time he had been promoted to Ship Lieutenant (Teniente de Navío). This expedition did a thorough study of the coast from Bucareli to Nootka, marking the map of Alaska and British Columbia with many names which are there today. Sailing from Nootka on June 13, 1792, Caamaño explored Bucareli Bay, off Prince of Wales Island, Alaska, and anchored in Dixon Entrance on July 20. Then he explored southward, passing through Principe Channel, Nepean Sound, Whale Sound, near the Estevan Group archipelago, then into Caamaño Sound and south through Laredo Channel, between Aristazabal Island and Princess Royal Island, returning to Nootka on September 7, 1792. He named Principe Channel, Laredo Channel, Campania Island, Campania Sound, Aristazabal Island, and Gil Island. George Vancouver adopted these names for his chart.