Who was the leader of the Aztec when Hern?

The leader of the Aztec Empire when Hernán Cortés arrived in 1519 was Moctezuma II. He ruled from 1502 to 1520 and was the ninth ruler of the empire. Moctezuma II initially welcomed Cortés and his men, believing them to be divine representatives, but his reign ended tragically with the fall of Tenochtitlán and his death.