Ixtlilxochitl II (c. 1500–c. 1550) was a Nahua nobleman, tlatoani of Texcoco.[1] He allied with Spain during the Spanish conquest of the Aztec Empire and assisted Hernán Cortés during the Siege of Tenochtitlan. He converted to Christianity under the name of Fernando Cortés Ixtlilxóchitl and ruled Texcoco in Spain's name until his death.