1788 in Puebla – 1823) was a Spanish naval officer and explorer, notable for his expeditions in the Pacific Northwest in the late 18th century.
First Pilot Esteban José Martínez was the expedition commander and captained the sloop Princesa Real.
Haro sailed San Carlos (el Filipino) west to Kodiak Island and on June 30 found the Russian post at Three Saints Bay.
Delarov also told Narváez that the Russians intended to occupy the port of Nootka Sound, on the west coast of Vancouver Island.
Haro and Martínez then sailed southwest to investigate Unalaska Island, where there was a large Russian post under the command of Potap Kuzmich Zaikov.