"It is not known who was "tlacochcalcatl" under the rule of Moctezuma I; possibly Tlacaelel held a dual office in this period.Under the rule of Moctezuma Ilhuicamina's son and successor Axayacatl, the "tlacochcalcatl" was Tizoc, who in turn became ruler at Axayacatl's death.